Question

What will be effect on energy of a charged capacitors if a dielectric is inserted between its plate?

Answer 1

BØÑJŌÙR !!

ANSWER...

When dielectric is inserted between the plates of an isolated capacitor, the charge is constant .

Since charge is constant, the capacitance increases, then the voltage across the capacitor must decreases. In this case the energy decreases as the expression for the energy stored in a capacitor is as follows.

$e = \frac{ {q}^{2} }{2c}$