If K is the dielectric constant of the medium. A is area of insulated charged plates and d is the distance between two plates of parallel plate condenser then its capacity in CGS unit is

Options

A. `(KA)/(4pid)`
B. `(KA)/(2pid)`
C. `(KA)/(pid)`
D. `(KA)/(d)`

Answer

A

Explanation

The capacity of parallel plate condenser is given by,
`C=(KAin_(0))/d=(KAin_(0))/d(4pi)/(4pi)`
`therefore" "C=(KA)/(4pid)` (in C. G. S. unit)