Question

A capacitor is fully charged by a battery. When the capacitor is still connected to the battery, the distance between the two plates decreases. Which of the followings will remain the same? Select all apply.

1. voltage across the capacitor

2.capacitance

3.charge stored in capacitor

4. electric field between the two plates

5. electric potential energy stored in capacitor

Answer 1

D Since, the capacitor as connected to the battery, The ross the capacitor y remain same 2) capactance C = EA since, d decreases C wall increases - capacitance will increase charge Q=cv Va constant, C = increases @ also increases · charge stored in capacitor will increase - 4 plates E= Electric field between the Here, va constant I d = decreases E will ancreases - 5 Potential energy stored an capacitor Q = ² cv² V= constant C= ancreases Q will increase .: The voltage across the capachor 13 only remain same