Question

A parallel plate capacitor is charged and then disconnected from the charging battery. If the plates are now moved farther apart by pulling them by means of insulating handles, then ______.

Options

• the energy stored in the capacitor decreases.

• the capacitance of the capacitor increases.

• the charge on the capacitor decreases.

• the voltage across the capacitor increases.

Answer 1

A parallel plate capacitor is charged and then disconnected from the charging battery. If the plates are now moved farther apart by pulling them by means of insulating handles, then the voltage across the capacitor increases.

Explanation:

`"C" = (epsilon_0"A")/"d"`

Hence, as d increases, C decreases. Also, since Q is constant, as C decreases V increases.