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question_answer1)
Directions Q. (1 - 36): For Assertion and Reason Type Questions
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In this type of question, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
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ASSERTION: If there exists coulomb attraction between two bodies, both of them may not be charged.
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REASON: In coulomb attraction two bodies ae oppositely charged.
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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
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question_answer2)
ASSERTION: The electric flux emanating out and entering a closed surface are \[8\times {{10}^{3}}\] and \[2\times {{10}^{3}}\,Vm\] respectively. The charge enclosed by the surface is \[0.053\,\mu C\]. |
REASON: Gauss's theorem in electrostatics may be applied to verify. |
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
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question_answer3)
ASSERTION: No two electric lines of force can intersect each other. |
REASON: Tangent at any point of electric line of force gives 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
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question_answer4)
ASSERTION: Charge is quantized. |
REASON: Charge which is less than 1 C is not possible. |
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
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question_answer5)
ASSERTION: Electric force acting on a proton and an electron, moving in a uniform electric field is same, where as acceleration of electron is 1836 times that of a proton. |
REASON: Electron is lighter than proton. |
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
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question_answer6)
ASSERTION: If a point charge q is placed in front of an infinite grounded conducting plane surface, the point charge will experience a force. |
REASON: This force is due to the induced charge on the conducting surface which is at zero potential. |
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
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question_answer7)
ASSERTION: As force is a vector quantity, hence electric field intensity is also a vector quantity. |
REASON: The unit of electric field intensity is Newton per coulomb. |
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
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question_answer8)
ASSERTION: In electrostatics, electric lines of force can never be closed loops, as a line can never start and end on the same charge. |
REASON: The number of electric lines of force originating or terminating on a charge is proportional to the magnitude 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
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question_answer9)
ASSERTION: Sharper is the curvature of spot on a charged body, lesser will be the surface charge density at that point. |
REASON: Electric field is non zero inside a charged 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
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question_answer10)
ASSERTION: If a conducting medium is placed between two charges, then electric force between them becomes zero. |
REASON: Reduction in a force due to introduced material is inversely proportional to its dielectric constant. |
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
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question_answer11)
ASSERTION: The surface densities of two spherical conductors of different radii are equal. Then the electric field intensities near their surface are also equal. |
REASON: Surface density is equal to charge per unit area. |
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
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question_answer12)
ASSERTION: For charge to be in equilibrium, sum of the forces on charge due to rest of the two charges must be zero. |
REASON: A charge is lying at the center of the line joining two similar charges each which are fixed. The system will be in equilibrium if that charge is one fourth of the similar charges. |
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
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question_answer13)
ASSERTION: Three equal charges are situated on a circle of radius r such that they form an equilateral triangle, then the electric intensity at the center is zero. |
REASON: The force on unit positive charge at the center, due to the three equal charges is represented by the three sides of a triangle taken in the same order. Therefore, electric field intensity at centre 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
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question_answer14)
ASSERTION: A point charge is brought in an electric field. The field at a nearby point is increased, what ever be the natue of the charge. |
REASON: The electric field is independent of the nature 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
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question_answer15)
ASSERTION: The electric lines of forces diverge from a positive charge and converge at a negative charge. |
REASON: A charged particle free to move in an electric field always moves along an electric line of force. |
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
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question_answer16)
ASSERTION: A point charge is lying at the center of a cube of each side. The electric flux emanating from each surface of the cube is \[\frac{1}{6}\]th of total flux. |
REASON: According to Gauss theorem, total electric flux through a closed surface enclosing a charge is equal to \[1/{{\varepsilon }_{0}}\] times the magnitude of the charge enclosed. |
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
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question_answer17)
ASSERTION: Charging is due to transfer of electrons. |
REASON: Mass of a body decreases slightly when it is negatively 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
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question_answer18)
ASSERTION: If a point charge be rotated in a circle around a charge the work done will be zero. |
REASON: Work done is equal to dot product of force and distance. |
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
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question_answer19)
ASSERTION: Range of coulomb force is infinite. |
REASON: Coulomb force acts between two charged 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
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question_answer20)
ASSERTION: A small metal ball is suspended in a uniform electric field with an insulated thread. If high energy X-ray beam falls on the ball, the ball will be deflected in the electric field. |
REASON:X-ray emits photolectron and metal becomes negatively 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
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question_answer21)
ASSERTION: A metallic shield in the form of a hollow shell may be built to block an electric field. |
REASON: In a hollow spherical shield, the electric field inside it is zero at every 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
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question_answer22)
ASSERTION: Electric lines of force cross each other. |
REASON: Electric field at a point superimposes to give one resultant 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
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question_answer23)
ASSERTION: If a proton and an electron are placed in the same uniform electric field, they experience different acceleration. |
REASON: Electric force on a test charge is independent of its 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
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question_answer24)
ASSERTION: The Coulomb force is dominating force in the universe. |
REASON: The Coulomb force is weaker than the gravitational force. |
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
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question_answer25)
ASSERTION: In a cavity within a conductor, the electric field is zero. |
REASON: Charges in a Conductor reside only at its surface. |
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
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question_answer26)
ASSERTION: Gauss's law can't be used to calculate electric field near an electric dipole. |
REASON: Electric dipoles don't have symmetrical charge distribution. |
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
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question_answer27)
ASSERTION: Gauss's law shows diversion when inverse square law is not obeyed. |
REASON: Gauss's law is a consequence of conservation of charges. |
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
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question_answer28)
ASSERTION: An electrostatic field line never form closed loop. |
REASON: Electrostatic field is a conservative 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
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question_answer29)
ASSERTION: On going away from a point charge or a small electric dipole, electric field decreases at the same rate in both the cases. |
REASON: Electric field is inversely proportional to square of distance from the charge or on electric dipole. |
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
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question_answer30)
ASSERTION: If a conductor is given charge then no excess inner charge appears. |
REASON: Electric field inside 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
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question_answer31)
ASSERTION: Gaussian surface is considered carefully. |
REASON: The point where electric field to be calculated should be within the surface. |
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
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question_answer32)
ASSERTION: A charged particle free to move in an electric field always moves along an electric field line. |
REASON: The electric filed lines diverge from a negative charge and converge at a positive 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
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question_answer33)
ASSERTION: If an electron and proton possessing same kinetic energy enter an electric field in a perpendicular direction, the path of the electron is more curved than that of the proton. |
REASON: Electron forms a large curve due to its 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
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question_answer34)
ASSERTION: Acceleration of charged particle in non-uniform electric field does not depend on velocity of charged particle. |
REASON: Charge is an invariant quantity. That is amount of charge on particle does not depend on frame of reference. |
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
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question_answer35)
ASSERTION: Net electric field inside conductor is zero. |
REASON: Total positive charge equals to total negative charge in a 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
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question_answer36)
ASSERTION: All the charge in a conductor gets distributed on whole of its outer surface. |
REASON: In a dynamic system, charges try to keep their potential energy minimum. |
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
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