A parallel plate condenser is charged by connected it to a battery. The battery is disconnected and a glass slab is introduced between the plates. Then

Options

A. charge and potential difference
B. charge and capacitance
C. energy stored and potential difference
D. energy stored and capacitance

Answer

C

Explanation

When a charging battery is disconnected and a glass slab is introduced between the plates, then
(i) Charge remains the same.
(ii) Capacitance increases.
(iii) Potential difference across the plates decreases.
(iv) Energy stored decreases.