12th Class Physics Magnetic Effects of Current / करंट का चुंबकीय प्रभाव Question Bank

done Assertion And Reason (MCQs) - Moving Charges and Magnetism Total Questions - 69

• question_answer1)

  Directions: (1-69) For Assertion and Reason Type Questions,

  In this type of question, a statement of assertion [A] is followed by a statement of reason [R]. Mark the correct choice

  ASSERTION: Magnetic field interacts with a moving Charge and not with a stationary charge.

  REASON: A moving charge produces a magnetic field.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer2)

  ASSERTION: If two long wires, hanging freely are connected to a battery in series, they come closer to the each other.

  REASON: Force of attraction acts between the two wires carrying current.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer3)

  ASSERTION: The magnetic field intensity at the centre of a circular coil carrying current changes, if the current through the coil is doubled.

  REASON: The magnetic field intensity is dependent on current in conductor.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer4)

  ASSERTION: If a charged particle is moving on a circular path in a perpendicular magnetic field, the momentum of the particle is not changing.

  REASON: Velocity of the particle in not changing in the magnetic field.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer5)

  ASSERTION: Force experienced by moving charge will be maximum if direction of velocity of charge is parallel to applied magnetic fields.

  REASON: Force on moving charge is independent of direction of applied magnetic field.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer6)

  ASSERTION: Magnetic field interacts with a moving charge and not with a stationary charge.

  REASON: A moving charge produces a magnetic field.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer7)

  ASSERTION: Force is directly proportional to magnetic field applied.

  REASON: If an electron is not deflected while passing through a certain region of space, then only possibility is that there is no magnetic field in this region.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer8)

  ASSERTION: Cyclotron is a device which is used to accelerate the positive ion.

  REASON: Cyclotron frequency depends up on the velocity.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer9)

  ASSERTION: When a charged particle moves perpendicular to magnetic field then its kinetic energy and momentum gets affected.

  REASON: Force changes velocity of charged particle.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer10)

  ASSERTION: Cyclotron does not accelerate electrons.

  REASON: Mass of electrons is very small.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer11)

  ASSERTION: Free electrons always keep on moving in a conductor even then no magnetic force act on them in magnetic field unless a current is passed through it.

  REASON: The average velocity of free electron is zero.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer12)

  ASSERTION: When radius of circular wire carrying current becomes half its magnetic moment becomes four times.

  REASON: Magnetic moment does not depend on area of the loop.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer13)

  ASSERTION: When force is zero, the charged particle follows linear path.

  REASON: A charged particle enters in a uniform magnetic field, whose velocity makes an angle 6 with magnetic field will cover a linear path.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer14)

  ASSERTION: Magnetic field lines can be entirely confined within the core of a toroid, but not within a straight solenoid.

  REASON: The magnetic field inside the solenoid is uniform.

   
  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer15)

  ASSERTION: The ion cannot move with a speed beyond a certain limit in a cyclotron.

  REASON: As velocity increases time taken by ion increases.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer16)

  ASSERTION: A moving coil galvanometer is based on heating effect of current.

  REASON: On heating, the coil starts to rotate in moving coil galvanometer.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer17)

  ASSERTION: Electron cannot be accelerated by the cyclotron.

  REASON: Cyclotron is suitable only for accelerating heavy particles.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer18)

  ASSERTION: A galvanometer can be used in electric circuit to detect the electric current.

  REASON: A galvanometer can be used as an ammeter only.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer19)
   

  ASSERTION: The coil is wound over me metallic frame in moving coil galvanometer.

  REASON: The metallic frame helps in making steady deflection without any oscillation.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer20)

  ASSERTION: The magnetic field produced by a current carrying solenoid is independent of its length and cross sectional area.

  REASON: The magnetic field inside the solenoid is uniform.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer21)

  ASSERTION: Out of galvanometer, ammeter and voltmeter, resistance of ammeter is lowest and resistance of voltmeter is highest.

  REASON: An ammeter is connected in series and a voltmeter is connected in parallel, in a circuit.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer22)

  ASSERTION: The magnetic field at the ends of a very long current carrying solenoid is half of that at the center.

  REASON: If the solenoid is sufficiently long, the field within it is uniform.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer23)

  ASSERTION: In electric circuits, wires carrying currents in opposite directions are often twisted together.

  REASON: If the wires are not twisted together, the combination of the wires forms a current loop the magnetic field generated by the loop might affect adjacent circuit or components.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer24)

  ASSERTION: A charged particle moving in a uniform magnetic field penetrates a layer of lead and thereby loses half of its kinetic energy. The radius of curvature of its path is now reduced to half of its initial value.

  REASON: Kinetic energy is inversely proportional to radius of curvature.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer25)

  ASSERTION: When two long parallel wires, hanging freely are connected in parallel to a battery, they come closer each other.

  REASON: Wires carrying current in opposite direction repel each other.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer26)

  ASSERTION: A loosely round helix made of stiff wire is suspended vertically with the lower end just touching a dish of mercury. When a current is passed through the wire, the helical wire executes oscillatory motion with the lower end jumping out of and into the mercury.

  REASON: When electric current is passed through helix, a magnetic field is produced both inside and outside the helix.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer27)

  ASSERTION: The resultant magnetic field of circular loop is due to x-component.

  REASON: In circular loop of wire, perpendicular components of magnetic field at some distance from center of loop turned over the whole loop, the result is zero.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer28)

  ASSERTION: Torque on the coil is maximum, when coil is suspended in a radial magnetic field.

  REASON: The torque tends to rotate the coil about its own axis.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer29)

  ASSERTION: When the observation point lies along the length of the current element, magnetic field is zero.

  REASON: Magnetic field close to current element is zero.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer30)

  ASSERTION: Like charges repel while opposite charges attract each other.

  REASON: If two beams of protons move parallel to each other in same direction then these beams repel each other.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer31)

  ASSERTION: For a point on the axis of a circular coil carrying Current, magnetic field is maximum at the center of the coil.

  REASON: Magnetic field is inversely proportional to the distance of point from the circular coil.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer32)

  ASSERTION: The mass of proton is 1837 times more than the mass of electron

  REASON: An electron and proton enters a magnetic field with equal velocities, then, the force experienced by proton will be more than electron.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer33)

  ASSERTION: A circular loop carrying current lies in XY plane with its center at origin having a magnetic flux in negative Z-axis.

  REASON: Magnetic flux direction is independent of the direction of current in condenser.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer34)

  ASSERTION: A direct current flows through a metallic rod, produced magnetic field only outside the rod.

  REASON: There is no flow of charge carriers inside the rod.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer35)

  ASSERTION: The resistance of a voltmeter is very small as compared to the resistance of the galvanometer, from which it is obtained.

  REASON: The voltmeters are connected in series to the condenser across which potential difference is to be measured.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer36)

  ASSERTION: Two parallel wires carrying current in the same direction attract each other because of potential difference between them.

  REASON: The potential difference between two parallel current carrying conductors produce acceleration.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer37)

  ASSERTION: The frequency of charge circulating in cyclotron depends up on the speed of the charge.

  REASON: The time which charge spends inside a dee is dependent of its velocity and radius of the semi circular path.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer38)

  ASSERTION: Magnetic field is not associated with a stationary charge.

  REASON: A magnetic field is detected by means of its effect on a current carrying conductor.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer39)

  ASSERTION: The energy of charged particle moving in a uniform magnetic field does not change.

  REASON: Work done by the magnetic field on the charge is zero.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer40)

  ASSERTION: The work done by magnetic field on a moving charge is zero.

  REASON: In magnetic field force is perpendicular to the velocity.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer41)

  ASSERTION: A solenoid tends to expand, when a current passes through it.

  REASON: Two straight metallic wires carrying current in same direction repel each other.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer42)

  ASSERTION: When current is represented by a straight line, the magnetic field will be circular.

  REASON: According to Fleming's left hand rule, direction of force is parallel to the magnetic field.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer43)

  ASSERTION: A small coil carrying current, in equilibrium, is perpendicular, to the direction of the uniform magnetic field.

  REASON: Torque is maximum when plane of coil and direction of the magnetic field is parallel to each other.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer44)

  ASSERTION: A current carrying conductor experiences a force in a magnetic field.

  REASON: The net charge on a current carrying conductor is zero.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer45)

  ASSERTION: In ammeter, current in shunt is always greater than current in galvanometer.

  REASON: Value of shunt resistance is negative if current in shunt is less than current in galvanometer.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer46)

  ASSERTION: The direction of force is given by Fleming's left hand rule.

  REASON: A magnetic field exerts a force on a moving charge in the same direction as the direction of field itself.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer47)

  ASSERTION: The range of given voltmeter can be both increased and decreased.

  REASON: By adjusting the value of resistance in series with galvanometer the range of voltmeter can be adjusted.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer48)

  ASSERTION: In a conductor, free electrons keep on moving but no magnetic force acts on a conductor in a magnetic field.

  REASON: Force on free electron due to magnetic field always acts perpendicular to its direction of motion.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer49)

  ASSERTION: Voltmeter is always connected in parallel in circuit across which voltage is to be measured.

  REASON: Voltmeter out across a part of the circuit, it read slightly more than the original voltage.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer50)

  ASSERTION: For a given charged particle moving in a given magnetic field, the radius of circular path is directly proportional to the momentum of particle.

  REASON: The effect of magnetic field on a charged particle changer only its path from linear to circular.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer51)

  ASSERTION: No net force acts on a rectangular coil carrying a steady current when suspended freely in a uniform magnetic field.

  REASON: Forces acting on each pair of the opposite sides of the coil are equal and opposite.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer52)

  ASSERTION: A stationary charged particle in a magnetic field does not experience a force.

  REASON: The force acting on a charged particle does not depend on velocity of the particle.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer53)

  ASSERTION: The kinetic energy of a charged particle moving in a uniform magnetic field does not change.

  REASON: In a uniform magnetic field no force acts on the charge particle.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer54)

  ASSERTION: If an electron and-proton enter in an electric field with equal energy, then path of electron is more curved than that of proton.

  REASON: Electron has a tendency to form large curve due to small mass.

   
  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer55)
  EXPECTED QUESTIONS

  ASSERTION: Voltmeter is connected in parallel with the circuit.

  REASON: Resistance of a voltmeter is very large.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer56)

  ASSERTION: A spark occurs between the poles of a switch when the switch is opened.

  REASON: Current flowing in the conductor produces magnetic field.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer57)

  ASSERTION: When radius of circular loop carrying current is doubled, its magnetic moment becomes four times.

  REASON: Magnetic moment depends on area of the loop.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer58)

  ASSERTION: The energy of charged particle moving in a uniform magnetic field does not change.

  REASON: Work done by magnetic field on die charge is zero.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer59)

  ASSERTION: A charge, whether stationary or in motion produces a magnetic field around it.

  REASON: Moving charges produce only electric field in the surrounding space.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer60)

  ASSERTION: If a proton and an a-particle enter a uniform magnetic field perpendicularly with the same speed, the time period of revolution of a-particle is double that of proton.

  REASON: In a magnetic field, the period of revolution of a charged particle is directly proportional to the mass of the particle and is inversely proportional to charge of particle.

   
  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer61)

  ASSERTION: Magnetic force is always perpendicular to the magnetic field.

  REASON: Electric force is along the direction of electric field.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer62)

  ASSERTION: A planar circular loop of area A and Carrying Current I is equivalent to magnetic dipole of dipole moment M = IA.

  REASON: At large distances, magnetic field of circular loop and magnetic dipole is same.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer63)

  ASERTION: A charged particle can be accelerated in a cyclotron by the alternate distribution of the field.

  REASON: Energy of charged particle is increased by the field applied.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer64)

  ASSERTION: Magnetic lines form closed loops in nature.

  REASON: Mono magnetic poles does not exist in nature.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer65)

  ASSERTION: Higher the range, greater is the resistance of ammeter.

  REASON: To increase the range of ammeter, additional shunt needs to be used across it.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer66)

  ASSERTION: When a magnetic dipole is placed in a non-uniform magnetic field, only a torque acts on the dipole.

  REASON: Force would act on dipole if magnetic field is uniform.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer67)

  ASSERTION: Magnetic field is useful in producing parallel beam of charged particle.

  REASON: Magnetic field inhibits the motion of charged particle moving across it.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer68)

  ASSERTION: Magnetic field cannot change K.E. of moving charge.

  REASON: Magnetic field cannot change velocity vector.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer69)

  ASSERTION: Electron moving perpendicular to B will perform circular motion

  REASON: Force by magnetic field is perpendicular to velocity.

  A)
  If both assertion and reason are true and reason is the correct explanation of assertion. done clear
  B)
  If both assertion and reason are true and reason is not the correct explanation of assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If both assertion and reason are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow