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

Question

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: [2026]

Smart Achievers · Accepted Answer

(1)

For series combination

$\frac{1}{C_{eq}} = \frac{1}{C_{1}} + \frac{1}{C_{2}}$

$∴$ $C_{eq} is less than C_{1} & C_{2} .$

Note: In statement C, capacitor is assumed to be completely filled with dielectric then on decreasing thickness of dielectric capacitance will increase.

Solution

1 A, C and D Only

2 B and D Only

3 C and D Only

4 A, B and C Only

Ans.
(1)

For series combination

$\frac{1}{C_{eq}} = \frac{1}{C_{1}} + \frac{1}{C_{2}}$

$∴$ $C_{eq} is less than C_{1} & C_{2} .$

Note: In statement C, capacitor is assumed to be completely filled with dielectric then on decreasing thickness of dielectric capacitance will increase.

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