A.P.D. of V volts is applied across the plates of a parallel plate capacitor having plate area A. if Q is the charge on its plates and K is the dielectric constant of the medium, between the plates, then the plate separation is given by

Options

A. `d=AK epsi_(0)V//Q`
B. `d=Kepsi_(0)V//Q`
C. `d=AKepsi_(0)Q//V`
D. `d=Kepsi_(0)Q//V`

Answer

A

Explanation

For a parallel plate capacitor, `C=(KA epsi_(0))/(d)`
But `C=(Q)/(V)" " therefore (Q)/(V)=(A epsi_(0))/(d)" "therefore d=(KA epsi_(0)V)/(Q)`