A parallel plate capacitor is charged and the charging battery is then disconnected. If the plates of the capacitor are moved farther apart by means of insulating handles:

Options

A. the charge on the capacitor increases
B. the voltage across the plates increases
C. the capacitance increases
D. the electrostatic energy stored in the capacitor increases

Answer

B, D

Explanation

Charging battery is removed .Therefore q= constant
Distance between the plates is increased .Therefore C decreased Now `V=q//c,q` is constant decreasing
Therefore V should increase
`U=1/2q^(2)/c` again q is constant and C is decreasing
Therefore U should increase `therefore` Correct are (B) and (D).