What is the electric potential at a distance of 9 cm from 3 nC ?

Options

A. 270 V
B. 3 V
C. 300 V
D. 30 V

Answer

C

Explanation

`V = 9 xx 10^(9) xx (q)/(r) " "(because V = (1)/(4pi epsilon_(0))(q)/(r))`
`V = (9 xx 10^(9) xx 3 xx 10^(-9))/(9 xx 10^(-2)) = 300 V`