The capacity of parallel plate condenser is `5muF`. When a glass plate is placed between the plates of the condenser, its potential difference reduces to `1//8` of the original value. The magnitude of relative dielectric constant of glass is

Options

A. 4
B. 6
C. 7
D. 8

Answer

D

Explanation

`V_(m)=V_("air")/k" "thereforek=V_("air")/V_(m)=1/(1//8)=8`