Identify the correct statements related to capacitors and electrostatics

Q. Identify the correct statements :

A. Effective capacitance of a series combination of capacitors is always smaller than the smallest capacitance of the capacitor in the combination.

B. When a dielectric medium is placed between the charged plates of a capacitor, displacement of charges cannot occur due to insulation property of dielectric.

C. Increasing of area of capacitor plate or decreasing of thickness of dielectric is an alternate method to increase the capacitance.

D. For a point charge, concentric spherical shells centered at the location of the charge are equipotential surfaces.

Choose the correct answer from the options given below :

1. A, C and D Only

2. A, B and C Only

3. B and D Only

4. C and D Only

Correct Answer: A, C and D Only

Solution

In a series combination of capacitors, the effective capacitance is given by the reciprocal sum of individual capacitances. Hence, the equivalent capacitance is always less than the smallest capacitance present in the combination. Therefore, statement A is correct.

When a dielectric is placed between capacitor plates, free charge motion does not occur, but bound charges do get displaced due to polarization. Hence displacement of charges does occur. Therefore, statement B is incorrect.

Capacitance of a parallel plate capacitor depends directly on the plate area and inversely on the separation between plates. Increasing area or decreasing dielectric thickness increases capacitance. Hence, statement C is correct.

For a point charge, the electric potential depends only on the radial distance from the charge. Therefore, all concentric spherical surfaces centered at the charge are equipotential surfaces. Hence, statement D is correct.

Thus, the correct statements are A, C and D only.

Q. Identify the correct statements :

Solution

Related JEE Main Physics Questions