Question

A capacitor consists of a set of two parallel plates of area A separated by a distance d. This capacitor is connected to a battery and charged until its plates carry charges If the separation between the plates is doubled, the electrical energy stored in the capacitor will

Answer 1

The electrical energy stored in the capacitor will be cut in half.

Step-by-step explanation:

The energy in a capacitator is given by E=C
`V^(2)`/2 and the formula for the Capacitance in a capacitator is C=
`(Q)/(V)` = ε
`(A)/(d)` .

So if we replace C = ε
`(A)/(d)` in the first equation we have:

E = ε
`(AV^(2) )/(2d)`