12th Class Physics Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर Question Bank

done Assertion And Reason (MCQs) - Current Electricity Total Questions - 65

• question_answer1)

  Directions: (1 - 65) 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 as :

  ASSERTION: Current is a scalar quantity.

  REASON: Electric current arises due to continuous flow of charged particles or ions.

  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: The e.m.f. of the driver cell in the Potentiometer experiment should be greater than the e.m.f. of the cell to be determined.

  REASON: The fall of potential across the potentiometer wire should not be less than the e.m.f of the cell to be determined.

  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: Insulators do not allow flow of current through them.

  REASON: Insulator has no free charge carrier.

  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: A potentiometer of longer length is used for accurate measurement.

  REASON: The potential gradient for a Potentiometer of longer length with a given source of e.m.f. becomes 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_answer5)

  ASSERTION: The drift velocity of electrons in a metallic wire will decrease, if the temperature of the wire is increased.

  REASON: On increasing temperature, conductivity of metallic wire decreases.

  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: The resistance of super conductor is zero.

  REASON: The super conductors are used for the transmission of electric power.

  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: The current flowing through a conductor is directly proportional to the drift velocity.

  REASON: As the drift velocity increases the current following through the conductor decreases.

  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: Electric field outside the conducting wire which carries a constant current is zero.

  REASON: Net charge on conducting wire 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_answer9)

  ASSERTION: Chemical reactions involved in primary cells are irreversible and in secondary cells are reversible.

  REASON: Primary cells can be recharged but secondary cells cannot be recharged.

  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: The electric bulbs glow immediately when switch is on.

  REASON: The drift velocity of electrons in a metallic wire is very high.

  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: The average thermal velocity of the electrons in a conductor is zero.

  REASON: Directions of motion of electrons are randomly oriented.

  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: There is no current in the metals in the absence of electric field.

  REASON: Motion of free electron is randomly.

  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: If the length of the conductor is doubled, the drift velocity will become half of the original value (keeping potential difference unchanged).

  REASON: At constant potential difference drift velocity is inversely proportional to the length of the 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_answer14)

  ASSERTION: The resistivity of a semi-conductor increases with temperature.

  REASON: The atoms of a semi-conductor vibrate with larger amplitude at higher, temperatures, thereby increasing its resistivity.

  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 temperature coefficient of resistance is always positive only for metals.

  REASON: On increasing the temperature the resistance of metals and alloys 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: Leclanche cell is used when constant supply of electric current is not required.

  REASON: The e.m.f. of a Leclanche cell falls, if it is used continuously.

  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: Material used in the construction of a standard resistance is constantan or magnanin.

  REASON: Temperature coefficient of constantan 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_answer18)

  ASSERTION: A voltmeter and ammeter can be used together to measure resistance but not power.

  REASON: Resistance and power both are proportional to voltage and 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_answer19)

  ASSERTION: KW hr is a commercial unit used for expressing consumed electric energy.

  REASON: A 100 Watt bulb has more resistance than a 200 W bulb.

  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: In practical application, power rating of resistance is not important.

  REASON: Property of resistance remains same even at high temperature.

  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: The 200 W bulbs glow with more brightness than 100 W bulbs.

  REASON: A 100 Watt Bulb has more resistance than a 200 W bulb.

  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: Electrolytes are more conducting than metal.

  REASON: Ions move faster than electrons.

  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: Heater wire must have high resistance and high melting point.

  REASON: If resistance is high the electric conductivity will be less.

  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: There is net electrostatic field inside the cell. When circuit is closed and steady current is passing.

  REASON: In closed circuit electron move from negative to positive electrode.

  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: Fuse wire must have high resistance and low melting point.

  REASON: Fuse is used for small current flow 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_answer26)

  ASSERTION: If 10 bulbs are connected in series and one bulb fused than the remaining 9 bulbs will not work.

  REASON: Bulb of higher wattage will give less bright light.

  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: In a chain of bulbs, 50 bulbs are joined in series. One bulb is removed now. If the remaining 49 bulbs are again connected in series across the same supply then light gets decreased in the room.

  REASON: The resistance of 49 bulbs will be more than 50 bulbs.

  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: When n cells each of internal resistance r are arbitrary connected in series, the total internal resistance of cells may be zero.

  REASON: The internal resistance depends on 'polarity of cell connected in 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_answer29)

  ASSERTION: Two electric bulbs of 50 and 100 watt are given. When connected in series 50 watt bulb glows more but when connected in parallel 100 watt bulb glows more.

  REASON: In series combination, power is directly proportional to the resistance of circuit. But in parallel combination power is inversely proportional to the resistance of the 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_answer30)

  ASSERTION: A potentiometer draws no current while measuring emf of a cell.

  REASON: Voltmeter is much better than a potentiometer for measuring emf of cell.

  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: Two bulbs of same wattage one having a carbon filament and the other having a metallic filament are connected in series. Metallic bulbs will glow more brightly than carbon filament bulb.

  REASON: Carbon is a semi-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_answer32)

  ASSERTION: The algebraic sum of currents meeting at junction in a closed circuit is zero.

  REASON: The Kirchhoff's first law does not obey law of conservation of charge.

  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: It is advantageous to transmit electric power at high voltage.

  REASON: High voltage implies high 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_answer34)

  ASSERTION: Thermistors are used in temperature control unit of industry.

  REASON: Thermistors are a heat sensitive device.

  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 peak value of voltage for an A.C. source is times the root mean square voltage.

  REASON: An electric bulb is first connected to a D.C. source and then to an A.C. source having the same voltage. Bulb glows with same brightness in both the cases.

  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: Resistance of a conductor increases with rise in temperature.

  REASON: V-I Graph for a conductor at two different temperatures \[{{T}_{1}}\] and \[{{T}_{2}}\] are shown here \[{{T}_{1}}>{{T}_{2}}\]. Graph?

   
  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: Though the same current flows through the line wires and the filament of the bulb but heat produced in the filament is much higher than that in line wires.

  REASON: The filament of bulbs is made of a material of high resistance and high melting point.

  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: When a wire is stretched to three times its length, its resistance becomes 9 times.

  REASON: Resistance is directly proportional to length of wire.

  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 current in a wire is due to flow of free electrons in a definite direction.

  REASON: A current carrying wire should be charged.

  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: In order to have maximum current, a series combination of cells is used where their internal resistance is much smaller than the external resistance.

  REASON: Current flowing through the circuit is inversely proportional to that resistance.

   
  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: Specific resistance is independent of cross-section of material used.

  REASON: When the radius of a copper wire is doubled, its specific resistance gets increased.

  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: Bulbs always fuse when they are switched off.

  REASON: When the bulb is switched off at that instant the resistance of the bulb 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_answer43)

  ASSERTION: A current flows in a conductor only when there is an electric field within the conductor.

  REASON: The drift velocity of electron in presence of electric field decreases.

  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: Voltage is not proportional to current in the case of non ohmic devices.

  REASON: Voltage is equal to product of resistance and. current as per Ohm's law.

  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: The coil of a heater is cut into two equal halves and only one of them is used into heater. The heater will now require half the time to produce the same amount of heat.

  REASON: The heat produced is directly proportional to square of 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_answer46)

  ASSERTION: When current through a bulb decreases by 0.5% the glow of bulb decreases by 1 %.

  REASON: Glow (power) which is directly proportional to square of 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_answer47)

  ASSERTION: Terminal voltage of a cell is greater than e.m.f. of the cell, during charging of the cell.

  REASON: The e.m.f. of a cell is always greater than its terminal 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_answer48)

  ASSERTION: A certain charge is liberated by 10.8 g of Oxygen, 10.8 g of silver can liberate same amount of charge.

  REASON: From Faraday's first law of electrolysis the amount of charge liberated is proportional to the mass of the substance taken.

  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: The anode of copper voltmeter has to be of copper only.

  REASON: The equivalent amount of copper from anode has to be dissolved into the electrolyte to preserve the concentration.

  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: Neutral temperature of a thermocouple does not depend upon temperature of cold junction.

  REASON: Its value is constant for the given metals of the couple.

  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: Capacity of a storage cell is measured in ampere hour.

  REASON: Ampere hour is the unit of discharging rate.

  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: Joule effect is irreversible, but Peltier effect is reversible.

  REASON: On reversing the direction of current through a conductor, amount of heat produced remains the same (Joule effect). But on reversing the direction of current through a thermocouple, heat is evolved at the junction where it was absorbed (Peltier effect).

  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)
  EXPECTED QUESTIONS

  ASSERTION: In a simple battery circuit, the point of the lowest potential is positive terminal of the battery.

  REASON: The current flows towards the point of the higher potential, as it does in such a circuit from the negative to the positive terminal.

  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: A larger dry cell has higher emf.

  REASON: The emf of a dry cell is proportional to its size.

  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)

  ASSERTION: A current continues to flow in superconducting coil even after switch is off.

  REASON: Superconducting coils show meissner effect.

  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: Ohm's law is applicable for all conducting elements.

  REASON: Ohm's law is a fundamental law.

  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: In the given circuit, emf is 2V and internal resistance of the cells is 10 and \[R=1\Omega \], then reading of the voltmeter is IV.

  REASON: \[V=R-1R\] where E = 2V, \[I=\frac{2}{2}=1A\]

   
  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: A domestic electrical appliance, working on a three pin will continue working even if the top pin is removed.

  REASON: The third pin is used only as a safety device.

  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 bird perches on a high power line and nothing happens to the bird.

  REASON: The level of bird is very high from the ground.

  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: It is advantageous to transmit electric power at high voltage.

  REASON: High voltage implies high 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_answer61)

  ASSERTION: Electric appliances with metallic body e.g. heaters, presses etc. have three pin connections, whereas an electric bulb has a two pin connection.

  REASON: Three pin connections reduce' heating of connecting cables.

  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: Total current entering a circuit is equal to leaving the circuit by Kirchhoff's law.

  REASON: It is based on conservation of energy.

  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)

  ASSERTION: Current is passed through a metallic wire so that it becomes red hot. When cold water is poured on half its partition, the rest of the half portion becomes more hot.

  REASON: Resistance decreases due to decrease in temperature.

  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: The conductivity of an electrolyte is very low as compared to a metal at room temperature.

  REASON: The number density of free ions on electrolyte is much smaller as compared to number density of free electrons in metals. Further ions drift much more slowly being heavier.

  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: An electrical bulb starts glowing instantly as it is switched on.

  REASON: Drift speed of electrons in a metallic wire 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