A parallel plate air capacity 'C' farad, potential 'V' volt and energy 'E' joule . When the gap between the plates is completely filled with dielectric

Options

A. both V and E increase
B. both V and E decrease
C. V decreases, E increases
D. V increases, E decreases

Answer

B

Explanation

When the space between the plates of a parallel plate capacitor is completely fileld with a dielectric, C is increased,
Both E and V are decreased.
`because V=(Q)/(C)`, V is decreased
and `E=(1)/(2)(Q^(2))/(C)` is also decreased