A capacitor is charged by a battery and energy stored is 'U'. Now the battery is removed and the distance…
A capacitor is charged by a battery and energy stored is 'U'. Now the battery is
removed and the distance between plates is increased to four times. The energy
stored becomes
$4 \mathrm{U}$
U.
$3 \mathrm{U}$
$2 \mathrm{U}$
Solution
As we know energy stored in capacitor is propotional to distance so, after increases the distance energy will be 4U.
~