CBSE Class 12 Physics Electrostatic Potential and Capacitance MCQs

Refer to CBSE Class 12 Physics Electrostatic Potential and Capacitance MCQs provided below. CBSE Class 12 Physics MCQs with answers available in Pdf for free download. The MCQ Questions for Class 12 Physics with answers have been prepared as per the latest syllabus, CBSE books and examination pattern suggested in Class 12 by CBSE, NCERT and KVS. Multiple Choice Questions for Chapter 2 Electrostatic Potential and Capacitance are an important part of exams for Class 12 Physics and if practiced properly can help you to get higher marks. Refer to more Chapter-wise MCQs for CBSE Class 12 Physics and also download more latest study material for all subjects

MCQ for Class 12 Physics Chapter 2 Electrostatic Potential and Capacitance

Class 12 Physics students should refer to the following multiple-choice questions with answers for Chapter 2 Electrostatic Potential and Capacitance in Class 12. These MCQ questions with answers for Class 12 Physics will come in exams and help you to score good marks

Chapter 2 Electrostatic Potential and Capacitance MCQ Questions Class 12 Physics with Answers

Question: A positively charged particle is released from rest in an uniform electric field. The electric potential energy of the charge
(a) remains a constant because the electric field is uniform
(b) increases because the charge moves along the electric field
(c) decreases because the charge moves along the electric field
(d) decreases because the charge moves opposite to the electric field 

Answer: C

 

Question: The electrostatic potential on the surface of a charged conducting sphere is 100V. Two statements are made in this regard S1 at any point inside the sphere, electric intensity is zero. S2 at any point inside the sphere, the electrostatic potential is 100V. Which of the following is a correct statement?
(a) S1 is true but S2 is false
(b) Both S1 and S2 are false
(c) S1 is true, S2 is also true and S1 is the cause of S2
(d) S1 is true, S2 is also true but the statements are independant

Answer: C

 

Question: Consider the following statements and select the correct statement(s).
I. Electric field lines are always perpendicular to equipotential surface.
II. No two equipotential surfaces can intersect each other.
III. Electric field lines are in the direction of tangent to an equipotential surface.
(a) I only   
(b) II only
(c) I and II
(d) I, II and III

Answer: A


Question: Equipotentials at a great distance from a collection of charges whose total sum is not zero are approximately
(a) spheres       
(b) planes
(c) paraboloids
(d) ellipsoids

Answer: A

 

Question: In a region, the potential is represented by V(x, y, z) = 6x – 8xy – 8y + 6yz, where V is in volts and x, y, z are in metres. The electric force experienced by a charge of 2 coulomb situated at point (1, 1, 1) is :

Answer: D

 

Question: A capacitor is charged by a battery. The battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of resulting system
(a) decreases by a factor of 2
(b) remains the same
(c) increases by a factor of 2
(d) increases by a factor of 4

Answer: A

 

Question: Choose the correct option

Assertion : Electric potential and electric potential energy  are different quantities.
Reason : For a system of positive test charge and point charge electric potential energy = electric potential.
(a) Assertion is correct, reason is correct; reason is a correct explanation for assertion.
(b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(c) Assertion is correct, reason is incorrect
(d) Assertion is incorrect, reason is correct.

Answer: C

 

Question:  A long, hollow conducting cylinder is kept coaxially inside another long, hollow conducting cylinder of larger radius. Both the cylinders are initially electrically neutral
(a) A potential difference appears between the two cylinders when a charge density is given to the inner cylinder.

(b) A potential difference appears between two cylinders when a charge density is given to the outer cylinder.

(c) No potential difference appears between the two cylinders when a uniform line charge is kept along the axis of the cylinders.

(d) No potential difference appears between the two cylinders when same charge density is given to both the cylinders.

Answer: A


Question: The electrostatic force between the metal plates of an isolated parallel plate capacitor C having a charge Q and area A, is

(a) independent of the distance between the plates

(b) linearly proportional to the distance between the plates

(c) inversely proportional to the distance between theplates

(d) proportional to the square root of the distance betweenthe plates

Answer: A


Question:  Choose the correct option

Assertion : For a non-uniformly charged thin circular ring with net charge is zero, the electric field at any point on axis of the ring is zero.
Reason : For a non-uniformly charged thin circular ring with net charge zero, the electric potential at each point on axis of the ring is zero.

(a) Assertion is correct, reason is correct; reason is a correct explanation for assertion.

(b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion

(c) Assertion is correct, reason is incorrect

(d) Assertion is incorrect, reason is correct.

Answer: D

 

Question:  The diagrams below show regions of equipotentials

(a) In all the four cases the work done is the same
(b) Minimum work is required to move q in figure (i)
(c) Maximum work is required to move q in figure (ii)
(d) Maximum work is required to move q in figure (iii)
Answer: A

Question: In a region of constant potential
(a) the electric field is uniform
(b) the electric field is zero
(c) the electric field shall necessarily change if a charge is placed outside the region
(d) None of these
Answer: B

Question: The electric potential inside a conducting sphere
(a) increases from centre to surface
(b) decreases from centre to surface
(c) remains constant from centre to surface
(d) is zero at every point inside
Answer: C
 
Question: It becomes possible to define potential at a point in an electric field because electric field
(a) is a conservative field
(b) is a non-conservative field
(c) is a vector field
(d) obeys principle of superposition
Answer: A
 
Question: Which of the following about potential at a point due to a given point charge is true ?
The potential at a point P due to a given point charge
(a) is a function of distance from the point charge.
(b) varies inversely as the square of distance from the point charge.
(c) is a vector quantity
(d) is directly proportional to the square of distance from the point charge.
Answer: A
 
Question: Which of the following quantities do not depend on the choice of zero potential or zero potential energy?
(a) Potential at a point
(b) Potential difference between two points
(c) Potential energy of a two-charge system
(d) None of these
Answer: B
 
Question: A cube of a metal is given a positive charge Question: For this system, which of the following statements is true?
(a) Electric potential at the surface of the cube is zero
(b) Electric potential within the cube is zero
(c) Electric field is normal to the surface of the cube
(d) Electric field varies within the cube
Answer: D
 
Question: A unit charge moves on an equipotential surface from a point A to point B, then
(a) VA – VB = + ve
(b) VA – VB = 0
(c) VA – VB = – ve
(d) it is stationary
Answer: B
 
Question: An equipotential surface is that surface
(a) on which each and every point has the same potential
(b) which has negative potential
(c) which has positive potential
(d) which has zero potential
Answer: A
 
Question: To obtain 3 μF capacity from three capacitors of 2 μF each, they will be arranged.
(a) all the three in series
(b) all the three in parallel
(c) two capacitors in series and the third in parallel with the combinatioin of first two
(d) two capacitors in parallel and the third in series with the combinatioin of first two
Answer: C
 
Question: There are two metallic spheres of same radii but one is solid and the other is hollow, then
(a) solid sphere can be given more charge
(b) hollow sphere can be given more charge
(c) they can be charged equally (maximum)
(d) None of the above
Answer: C
 
Question: If a unit positive charge is taken from one point to another over an equipotential surface, then
(a) work is done on the charge
(b) work is done by the charge
(c) work done is constant
(d) no work is done
Answer: D
 
Question: On moving a charge of Q coulomb by X cm, W J of work is done, then the potential difference between the points is
(a) W/Q *V
(b) QW V
(c) Q/W V
(d) Q2 /W V
Answer: A
 
Question: The positive terminal of 12 V battery is connected to the ground. Then the negative terminal will be at
(a) – 6 V
(b) + 12 V
(c) zero
(d) – 12 V
Answer: D
 
Question: The maximum electric field that a dielectric medium can withstand without break-down is called its
(a) permittivity
(b) dielectric constant
(c) electric susceptibility
(d) dielectric strength
Answer: D
 
Question: The potential energy of a system of two charges is negative when
(a) both the charges are positive
(b) both the charges are negative
(c) one charge is positive and other is negative
(d) both the charges are separated by infinite distance
Answer: C
 
Question: The electric potential at a point on the equatorial line of an electric dipole is
(a) directly proportional to distance
(b) inversely proportional to distance
(c) inversely proportional to square of the distance
(d) None of these
Answer: D
 
Question: An electric dipole is kept in non-uniform elecric field. it experiences
(a) a force and a torque
(b) a force but not a torque
(c) a torque but not a force
(d) Neither a force nor a torque
Answer: A
 
Question: Consider the followoing statements regarding series grouping of capacitors and select the correct statements.
I. Charge on each capacitor remains same and equals to the main charge supplied by the battery.
II. Potential difference and energy distributes in the reverse ratio of capacitance.
III. Effective capacitance is even les than the least of teh individual capacitances.
(a) I and II
(b) I and III
(c) II and III
 (d) I, II and III
Answer: D
 
Question: A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10 V. The potential at a distance of 2 cm from the centre of the sphere is
(a) zero
(b) 10 V
(c) 4 V
(d) 10/3 V
Answer: B
 
Question: A charge is brought from a point on the equatorial plane of a dipole to its mid-point. Which of the following quantities remains constant ?
(a) Electric field
(b) Force on the charge brought.
(c) Torque exerted by the charge on dipole.
(d) Electric potential
Answer: D
 
Question: On decreasing the distance between the plates of a parallel plate capacitor, its capacitance
(a) remains unaffected
(b) decreases
(c) first increases then decreases.
(d) increases
Answer: D
 
Question: Energy is stored in a capacitor in the form of
(a) electrostatic energy
(b) magnetic energy
(c) light energy
(d) heat energy
Answer: A
 
Question: A capacitor works in
(a) A. C. circuits
(b) D. C. circuits
(c) both (a) and (b)
(d) neither (a) nor (b)
Answer: D
 
Question: In a charged capacitor, the energy is stored in
(a) the negative charges
(b) the positive charges
(c) the field between the plates
(d) both (a) and (b)
Answer: C
 
Question: A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor
(a) decreases
(b) remains unchanged
(c) becomes infinite
(d) increases
Answer: B
 
Question: The potential gradient at which the dielectric of a condenser just gets punctured is called
(a) dielectric constant
(b) dielectric strength
(c) dielectric resistance
(d) dielectric number
Answer: B
 
Question: When air in a capacitor is replaced by a medium of dielectric constant K, the capacity
(a) decreases K times
(b) increases K times
(c) increases K2 times
(d) remains constant
Answer: B
 
Question: A parallel plate condenser is immersed in an oil of dielectric constant 2. The field between the plates is
(a) increased, proportional to 2
(b) decreased, proportional to 1/2 
(c) increased, proportional to – 2
(d) decreased, proportional to -1/2
Answer: B
 
Question: A conductor carries a certain charge. When it is connected to another uncharged conductor of finite capacity, then the energy of the combined system is
(a) more than that of the first conductor
(b) less than that of the first conductor
(c) equal to that of the first conductor
(d) uncertain
Answer: B
 
Question: Capacitiors are used in electrical circuits where appliances need more
(a) voltage
(b) current
(c) resistance
(d) power
Answer: B
 
Question: The work done in placing a charge of 8 × 10–18 coulomb on a condenser of capacity 100 micro-farad is
(a) 3.1 × 10–26 joule
(b) 4 × 10–10 joule
(c) 32 × 10–32 joule
(d) 16 × 10–232 joule
Answer: C
 
Question: An arrangement which consists of two conductors separated by a dielectric medium is called
(a) resistor
(b) inductor
(c) rectifier
(d) capacitor
Answer: D
 
Question: Capacity of a parallel plate condenser can be increased by
(a) increasing the distance between the plates
(b) increasing the thickness of the plates
(c) decreasing the thickness of the plates
(d) decreasing the distance between the plates
Answer: D
 
Question: In a charged capacitor, the energy resides
(a) in the positive charges.
(b) in both the positive and negative charges.
(c) in the field between the plates.
(d) around the edges of the capacitor plates.
Answer: C
 
Question: ...X... is a machine that can build up high voltages of the order of a few million volts. Here, A refers to
(a) Dynamo
(b) Van De Graaff generator
(c) DC generator
(d) AC generator
Answer: B
 
Question: In case of a Van de Graaff generator, the breakdown field of air is
(a) 2 × 108 V m–1
(b) 3 × 106 V m–1
(c) 2 × 108 V m–1
(d) 3 × 104 V m–1
Answer: B
 
Question: Van de Graaff generator is used to
(a) store electrical energy
(b) build up high voltage of few million volts
(c) decelerate charged particle like electrons
(d) both (a) and (b)
Answer: B
 
Question: Which of the following is / are true about the principle of Van de Graaff generator?
(a) The action of sharp points.
(b) The charge given to a hollow conductor is tranferred to outer surface and is distributed uniformly over it.
(c) It is used for accelerating uncharged particle.
(d) Both (a) and (b)
Answer: D
 
Question: Which of the following about potential difference between any two points is true?
I. It depends only on the initial and final position.
II. It is the work done per unit positive charge in moving from one point to other.
III. It is more for a positive charge of two units as compared to a positive charge of one unit.
(a) I only
(b) II only
(c) I and II
(d) I, II and III
Answer: C
 
Question: Consider the following statements and select the correct option
I. In an external electric field, the positive and negative charges of a non–polar molecule are displaced in opposite directions.
II. In non –polar molecules displacement stops when the external force on the constituent charges of the molecule is balanced by the restoring force.
III. The non–polar molecule develops an induced dipole moment.
(a) I and II
(b) II and III
(c) I and III
(d) I, II and III
Answer: D
 
Question: Consider the following statements and select the correct statement(s).
I. Electric field lines are always perpendicular to equipotential surface.
II. No two equipotential surfaces can intersect each other.
III. Electric field lines are in the direction of tangent to an equipotential surface.
(a) I only
(b) II only
(c) I and II
(d) I, II and III
Answer: C
 
Question: When a metal plate is introduced between the two plates of a charged capacitor and insulated from them, then which of following statement(s) is/are correct ?
I. The metal plate divides the capacitor into two capacitors connected in parallel to each other
II. The metal plate divides the capacitors into two capacitors connected in series with each other
III. The metal plate is equivalent to a dielectric of zero dielectric constant
(a) I only
(b) II only
(c) I and II
(d) I, II and III
Answer: B
 
Question: Which of the following statements is/are correct for equipotential surface ?
I. The potential at all the points on an equipotential surface is same.
II. Equipotential surfaces never intersect each other.
III. Work done in moving a charge from one point to other on an equipotential surface is zero.
(a) I only
(b) II only
(c) I and II
(d) I, II and III
Answer: D

 

 

 

(a) In all the four cases the work done is the same
(b) Minimum work is required to move q in figure (i)
(c) Maximum work is required to move q in figure (ii)
(d) Maximum work is required to move q in figure (iii)
Answer: A

Question: In a region of constant potential
(a) the electric field is uniform
(b) the electric field is zero
(c) the electric field shall necessarily change if a charge is placed outside the region
(d) None of these
Answer: B

Question: The electric potential inside a conducting sphere
(a) increases from centre to surface
(b) decreases from centre to surface
(c) remains constant from centre to surface
(d) is zero at every point inside
Answer: C
 
Question: It becomes possible to define potential at a point in an electric field because electric field
(a) is a conservative field
(b) is a non-conservative field
(c) is a vector field
(d) obeys principle of superposition
Answer: A
 
Question: Which of the following about potential at a point due to a given point charge is true ?
The potential at a point P due to a given point charge
(a) is a function of distance from the point charge.
(b) varies inversely as the square of distance from the point charge.
(c) is a vector quantity
(d) is directly proportional to the square of distance from the point charge.
Answer: A
 
Question: Which of the following quantities do not depend on the choice of zero potential or zero potential energy?
(a) Potential at a point
(b) Potential difference between two points
(c) Potential energy of a two-charge system
(d) None of these
Answer: B
 
Question: A cube of a metal is given a positive charge Question: For this system, which of the following statements is true?
(a) Electric potential at the surface of the cube is zero
(b) Electric potential within the cube is zero
(c) Electric field is normal to the surface of the cube
(d) Electric field varies within the cube
Answer: D
 
Question: A unit charge moves on an equipotential surface from a point A to point B, then
(a) VA – VB = + ve
(b) VA – VB = 0
(c) VA – VB = – ve
(d) it is stationary
Answer: B
 
Question: An equipotential surface is that surface
(a) on which each and every point has the same potential
(b) which has negative potential
(c) which has positive potential
(d) which has zero potential
Answer: A
 
Question: To obtain 3 μF capacity from three capacitors of 2 μF each, they will be arranged.
(a) all the three in series
(b) all the three in parallel
(c) two capacitors in series and the third in parallel with the combinatioin of first two
(d) two capacitors in parallel and the third in series with the combinatioin of first two
Answer: C
 
Question: There are two metallic spheres of same radii but one is solid and the other is hollow, then
(a) solid sphere can be given more charge
(b) hollow sphere can be given more charge
(c) they can be charged equally (maximum)
(d) None of the above
Answer: C
 
Question: If a unit positive charge is taken from one point to another over an equipotential surface, then
(a) work is done on the charge
(b) work is done by the charge
(c) work done is constant
(d) no work is done
Answer: D
 
Question: On moving a charge of Q coulomb by X cm, W J of work is done, then the potential difference between the points is
(a) W/Q *V
(b) QW V
(c) Q/W V
(d) Q2 /W V
Answer: A
 
Question: The positive terminal of 12 V battery is connected to the ground. Then the negative terminal will be at
(a) – 6 V
(b) + 12 V
(c) zero
(d) – 12 V
Answer: D
 
Question: The maximum electric field that a dielectric medium can withstand without break-down is called its
(a) permittivity
(b) dielectric constant
(c) electric susceptibility
(d) dielectric strength
Answer: D
 
Question: The potential energy of a system of two charges is negative when
(a) both the charges are positive
(b) both the charges are negative
(c) one charge is positive and other is negative
(d) both the charges are separated by infinite distance
Answer: C
 
Question: The electric potential at a point on the equatorial line of an electric dipole is
(a) directly proportional to distance
(b) inversely proportional to distance
(c) inversely proportional to square of the distance
(d) None of these
Answer: D
 
Question: An electric dipole is kept in non-uniform elecric field. it experiences
(a) a force and a torque
(b) a force but not a torque
(c) a torque but not a force
(d) Neither a force nor a torque
Answer: A
 
Question: Consider the followoing statements regarding series grouping of capacitors and select the correct statements.
I. Charge on each capacitor remains same and equals to the main charge supplied by the battery.
II. Potential difference and energy distributes in the reverse ratio of capacitance.
III. Effective capacitance is even les than the least of teh individual capacitances.
(a) I and II
(b) I and III
(c) II and III
 (d) I, II and III
Answer: D
 
Question: A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10 V. The potential at a distance of 2 cm from the centre of the sphere is
(a) zero
(b) 10 V
(c) 4 V
(d) 10/3 V
Answer: B
 
Question: A charge is brought from a point on the equatorial plane of a dipole to its mid-point. Which of the following quantities remains constant ?
(a) Electric field
(b) Force on the charge brought.
(c) Torque exerted by the charge on dipole.
(d) Electric potential
Answer: D
 
Question: On decreasing the distance between the plates of a parallel plate capacitor, its capacitance
(a) remains unaffected
(b) decreases
(c) first increases then decreases.
(d) increases
Answer: D
 
Question: Energy is stored in a capacitor in the form of
(a) electrostatic energy
(b) magnetic energy
(c) light energy
(d) heat energy
Answer: A
 
Question: A capacitor works in
(a) A. C. circuits
(b) D. C. circuits
(c) both (a) and (b)
(d) neither (a) nor (b)
Answer: D
 
Question: In a charged capacitor, the energy is stored in
(a) the negative charges
(b) the positive charges
(c) the field between the plates
(d) both (a) and (b)
Answer: C
 
Question: A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor
(a) decreases
(b) remains unchanged
(c) becomes infinite
(d) increases
Answer: B
 
Question: The potential gradient at which the dielectric of a condenser just gets punctured is called
(a) dielectric constant
(b) dielectric strength
(c) dielectric resistance
(d) dielectric number
Answer: B
 
Question: When air in a capacitor is replaced by a medium of dielectric constant K, the capacity
(a) decreases K times
(b) increases K times
(c) increases K2 times
(d) remains constant
Answer: B
 
Question: A parallel plate condenser is immersed in an oil of dielectric constant 2. The field between the plates is
(a) increased, proportional to 2
(b) decreased, proportional to 1/2 
(c) increased, proportional to – 2
(d) decreased, proportional to -1/2
Answer: B
 
Question: A conductor carries a certain charge. When it is connected to another uncharged conductor of finite capacity, then the energy of the combined system is
(a) more than that of the first conductor
(b) less than that of the first conductor
(c) equal to that of the first conductor
(d) uncertain
Answer: B
 
Question: Capacitiors are used in electrical circuits where appliances need more
(a) voltage
(b) current
(c) resistance
(d) power
Answer: B
 
Question: The work done in placing a charge of 8 × 10–18 coulomb on a condenser of capacity 100 micro-farad is
(a) 3.1 × 10–26 joule
(b) 4 × 10–10 joule
(c) 32 × 10–32 joule
(d) 16 × 10–232 joule
Answer: C
 
Question: An arrangement which consists of two conductors separated by a dielectric medium is called
(a) resistor
(b) inductor
(c) rectifier
(d) capacitor
Answer: D
 
Question: Capacity of a parallel plate condenser can be increased by
(a) increasing the distance between the plates
(b) increasing the thickness of the plates
(c) decreasing the thickness of the plates
(d) decreasing the distance between the plates
Answer: D
 
Question: In a charged capacitor, the energy resides
(a) in the positive charges.
(b) in both the positive and negative charges.
(c) in the field between the plates.
(d) around the edges of the capacitor plates.
Answer: C
 
Question: ...X... is a machine that can build up high voltages of the order of a few million volts. Here, A refers to
(a) Dynamo
(b) Van De Graaff generator
(c) DC generator
(d) AC generator
Answer: B
 
Question: In case of a Van de Graaff generator, the breakdown field of air is
(a) 2 × 108 V m–1
(b) 3 × 106 V m–1
(c) 2 × 108 V m–1
(d) 3 × 104 V m–1
Answer: B
 
Question: Van de Graaff generator is used to
(a) store electrical energy
(b) build up high voltage of few million volts
(c) decelerate charged particle like electrons
(d) both (a) and (b)
Answer: B
 
Question: Which of the following is / are true about the principle of Van de Graaff generator?
(a) The action of sharp points.
(b) The charge given to a hollow conductor is tranferred to outer surface and is distributed uniformly over it.
(c) It is used for accelerating uncharged particle.
(d) Both (a) and (b)
Answer: D
 
Question: Which of the following about potential difference between any two points is true?
I. It depends only on the initial and final position.
II. It is the work done per unit positive charge in moving from one point to other.
III. It is more for a positive charge of two units as compared to a positive charge of one unit.
(a) I only
(b) II only
(c) I and II
(d) I, II and III
Answer: C
 
Question: Consider the following statements and select the correct option
I. In an external electric field, the positive and negative charges of a non–polar molecule are displaced in opposite directions.
II. In non –polar molecules displacement stops when the external force on the constituent charges of the molecule is balanced by the restoring force.
III. The non–polar molecule develops an induced dipole moment.
(a) I and II
(b) II and III
(c) I and III
(d) I, II and III
Answer: D
 
Question: Consider the following statements and select the correct statement(s).
I. Electric field lines are always perpendicular to equipotential surface.
II. No two equipotential surfaces can intersect each other.
III. Electric field lines are in the direction of tangent to an equipotential surface.
(a) I only
(b) II only
(c) I and II
(d) I, II and III
Answer: C
 
Question: When a metal plate is introduced between the two plates of a charged capacitor and insulated from them, then which of following statement(s) is/are correct ?
I. The metal plate divides the capacitor into two capacitors connected in parallel to each other
II. The metal plate divides the capacitors into two capacitors connected in series with each other
III. The metal plate is equivalent to a dielectric of zero dielectric constant
(a) I only
(b) II only
(c) I and II
(d) I, II and III
Answer: B
 
Question: Which of the following statements is/are correct for equipotential surface ?
I. The potential at all the points on an equipotential surface is same.
II. Equipotential surfaces never intersect each other.
III. Work done in moving a charge from one point to other on an equipotential surface is zero.
(a) I only
(b) II only
(c) I and II
(d) I, II and III
Answer: D
 

Question: The electric potential inside a conducting sphere

(a) increases from centre to surface
(b) decreases from centre to surface
(c) remains constant from centre to surface
(d) is zero at every point inside

Answer=C

 

Question:  It becomes possible to define potential at a point in an electric field because electric field

(a) is a conservative field
(b) is a non-conservative field
(c) is a vector field
(d) obeys principle of superposition

Answer=A

 

Question: Which of the following about potential at a point due to a given point charge is true ?

The potential at a point P due to a given point charge

(a) is a function of distance from the point charge.
(b) varies inversely as the square of distance from the point charge.
(c) is a vector quantity.
(d) is directly proportional to the square of distance from the point charge.

Answer=A


Question:  Which of the following quantities do not depend on the choice of zero potential or zero potential energy?

(a) Potential at a point
(b) Potential difference between two points
(c) Potential energy of a two-charge system
(d) None of these

Answer: B

 

Question: A cube of a metal is given a positive charge Question: For this system, which of the following statements is true?

(a) Electric potential at the surface of the cube is zero
(b) Electric potential within the cube is zero
(c) Electric field is normal to the surface of the cube
(d) Electric field varies within the cube

Answer: D

 

Question: The electric potential at a point on the equatorial line of an electric dipole is

(a) directly proportional to distance
(b) inversely proportional to distance
(c) inversely proportional to square of the distance
(d) None of these

Answer: D

 

Question: A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10 V. The potential at a distance of 2 cm from the centre of the sphere is

(a) zero

(b) 10 V

(c) 4 V

(d) 10/3 V

Answer: B

 

Question: Choose the correct option

Assertion : Electric field is discontinuous across the surface of a spherical charged shell.
Reason : Electric potential is continuous across the surface of a spherical charged shell

(a) Assertion is correct, reason is correct; reason is a correct explanation for assertion.
(b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(c) Assertion is correct, reason is incorrect
(d) Assertion is incorrect, reason is correct.

Answer: B

 

Question: From a point charge, there is a fixed point A. At A, there is an electric field of 500 V/m and potential difference of 3000 V. Distance between point charge and A will be

(a) 6 m

(b) 12 m

(c) 16 m

(d) 24 m

Answer: A

 

Question: Two metal pieces having a potential difference of 800 V are 0.02 m apart horizontally. A particle of mass 1.96 × 10–15 kg is suspended in equilibrium between the plates. If e is the elementary charge, then charge on the particle is

(a) 8

(b) 6

(c) 0.1

(d) 3

Answer: D

Chapter 01 Electric Charges and Fields
CBSE Class 12 Physics Electric Charges and Fields MCQs
Chapter 02 Electrostatic Potential and Capacitance
CBSE Class 12 Physics Electrostatic Potential and Capacitance MCQs
Chapter 03 Current Electricity
CBSE Class 12 Physics Current Electricity MCQs
Chapter 04 Moving Charges and Magnetism
CBSE Class 12 Physics Moving Charges and Magnetism MCQs
Chapter 05 Magnetism and Matter
CBSE Class 12 Physics Magnetism and Matter MCQs
Chapter 06 Electromagnetic Induction
CBSE Class 12 Physics Electromagnetic Induction MCQs
Chapter 07 Alternating Current
CBSE Class 12 Physics Alternating Current MCQs
Chapter 08 Electromagnetic Waves
CBSE Class 12 Physics Electromagnetic Waves MCQs
CBSE Class 12 Physics Gravitation MCQs
Chapter 09 Ray Optics and Optical Instruments
CBSE Class 12 Physics Ray Optics and Optical Instruments MCQs
Chapter 10 Wave Optics
CBSE Class 12 Physics Wave Optics MCQs
Chapter 11 Dual Nature of Radiation and Matter
CBSE Class 12 Physics Dual Nature of Radiation and Matter MCQs
Chapter 12 Atoms
CBSE Class 12 Physics Atoms MCQs
Chapter 13 Nuclei
CBSE Class 12 Physics Nuclei MCQs
Chapter 14 Semiconductor Electronics Materials Devices and Simple Circuits
CBSE Class 12 Physics Semiconductor Electronics Materials Devices and Simple Circuits MCQs
Chapter 15 Communication Systems
CBSE Class 12 Physics Communication Systems MCQs

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CBSE Class 12 Physics Chapter 2 Electrostatic Potential and Capacitance MCQs

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