Question

A parallel plate capacitor is connected to a $5V$ battery and charged. The battery is then disconnected and a glass slab is introduced between the plates. Then the quantities that decrease are

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

Answer 1

Answer: (E)

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.