If infinite parallel plane sheet of a metal is charged to charge density `sigma` coulomb per square metre in a medium of dielectric constant K. Intensity of electric field near the metallic surface will be

Options

A. `E=(sigma)/(epsilon_(0)K)`
B. `E=(K)/(3 epsilon_(0))`
C. `E=(sigma)/(2 epsilon_(0)K)`
D. `E=(K)/(2epsilon_(0))`

Answer

C

Explanation

We have, `E=(sigma)/(2epsilon)=(sigma)/(2epsilon_(0)K)" "(because(epsilon)/(epsilon_(0))=K)`