Question Bank for 12th Class Physics Electrostatics & Capacitance Assertion And Reason (MCQs) - Electrostatic Potential and Capacitance

1)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): Work done in moving a charge between any two points in an electric field is independent of the path followed by the charge, between these points.

Reason (R): Electrostatic force is a non-conservative force.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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2)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): Electric potential of the earth is zero.

Reason (R): The electric field due to the earth is zero.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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3)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): No work is done in taking a positive charge from one point to other inside a positively charged metallic sphere while outside the sphere work is done in taking the charge toward the sphere.

Reason (R): Inside the sphere electric potential is same at each potential, but outside it is different for different points.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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4)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): For a point charge concentric spheres centered at a Location of the charge are equipotential surfaces.

Reason (R): An equipotential surface is a surface over which potential has zero value.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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5)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): The surface of a conductor is an equipotential surface.

Reason (R): Conductor allows the flow of charge.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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6)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): The electric field inside a cavity is always zero.

Reason (R): Charges reside only on the outer surface of a conductor with cavity.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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7)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): Two adjacent conductors, carrying the same positive charge have no potential difference between them.

Reason (R): The potential of a conductor does not depend upon the charge given to it.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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8)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): An applied electric field will polarize the polar dielectric material.

Reason (R): In polar dielectrics, each molecule has a permanent dipole moment but these are randomly oriented in the absence of an externally applied electric field.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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9)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): Dielectric polarisation means formation of positive and negative charges inside the dielectric.

Reason (R): Free electrons are formed in this process.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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10)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): Polar molecules have permanent dipole moment.

Reason (R): In polar molecule, the centres of positive and negative charges coincide even when there is no external field.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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11)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): In the absence of an external electric field, the dipole moment per unit volume of a polar dielectric is zero.

Reason (R): The dipoles of a polar dielectric are randomly oriented.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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12)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): Increasing the charge on the plates of a capacitor means increasing the capacitance.

Reason (R): Capacitance is directly proportional to charge.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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13)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): The potential difference between the two conductors of a capacitor is small.

Reason (R): A capacitor is so configured that it confines the electric field lines within a small region of space.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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14)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): Capacity of a parallel plate capacitor increases when distance between the plates is decreased.

Reason (R): Capacitance of capacitor is inversely proportional to distance between them.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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15)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): When a dielectric medium is filled between the plates of a condenser, its capacitance increases.

Reason (R): The dielectric medium reduces the potential difference between the plates of the condenser.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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16)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): If the distance between parallel plates of capacitor is halved and dielectric constant is made three times, then the capacitance becomes six times.

Reason (R): Capacitance of the capacitor does not depend upon the nature of the material of the plates.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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17)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): The dielectric constant for metals is infinity.

Reason (R): When a charged capacitor is filled completely with a metallic slab, its capacity becomes very large.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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18)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): If distance between the parallel plates of a capacitor is halved, then its capacitance is doubled.

Reason (R): The capacitance depends on the introduced dielectric.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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19)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): When air between the plates of a parallel plate condenser is replaced by an insulating medium of dielectric constant its capacity increases.

Reason (R): Electric field intensity between the plates with dielectric in between it is reduced.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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20)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): Capacity of parallel plate condenser remains unaffected on introducing a insulating slab between the plates.

Reason (R): Electric field intensity between the plates increases on introducing the insulating slab.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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21)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): Charge on all the condensers connected in series is the same.

Reason (R): Capacitance of capacitor is directly proportional to charge on it.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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22)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): In a parallel combination of capacitors, the total capacitance of the combination is the sum of capacitance of the individual capacitors.

Reason (R): In such a combination, voltage across each capacitor is same.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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23)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): A capacitor is connected to a battery. If we move its plate further apart, work will be done against the electrostatic attraction between the plates and the energy of the capacitor gets decreased.

Reason (R): The energy stored in capacitor is dissipated in the form of heat energy.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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24)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): Surface of a symmetrical conductor can be treated as equipotential surface.

Reason (R): Charges can easily flow in a conductor.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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25)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): If three capacitors of capacitance\[{{C}_{1}}<{{C}_{2}}<{{C}_{3}}\], are connected in parallel then their equivalent capacitance \[\left( {{C}_{p}} \right)>\]equivalent capacitance in series.

Reason (R):\[\frac{1}{{{C}_{P}}}=\frac{1}{{{C}_{1}}}+\frac{1}{{{C}_{2}}}+\frac{1}{{{C}_{3}}}.\]

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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26)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): The capacitance of a given conductor remains same even if charge is varied on it.

Reason (R): Capacitance depends upon nearly medium as well as size and shape of conductor.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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27)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): A charged capacitor is disconnected from a battery. Now if its plate are separated farther, the potential energy will fall.

Reason (R): Energy stored in a capacitor is not equal to the work done in charging it.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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28)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:

Assertion (A): A parallel plate capacitor is connected across battery through a key. A dielectric slab of constant K is introduced between the plates. The energy which is stored becomes K times.

Reason (R): The surface density of charge on the plate remains constant or unchanged.

A)

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

B)

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C)

Assertion (A) is true but Reason (R) is false

D)

Assertion (A) is false and Reason (R) is also false

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12th Class Physics Electrostatics & Capacitance Question Bank

done Assertion And Reason (MCQs) - Electrostatic Potential and Capacitance Total Questions - 28

Study Package

Assertion And Reason (MCQs) - Electrostatic Potential and Capacitance

Assertion And Reason (MCQs) - Electrostatic Potential and Capacitance Total Questions - 28