If `4 xx 10^(20)` eV of energy is required to move a charge of 6.25 C between two points, the potential difference between them is

Options

A. 10.24 V
B. 24.10 V
C. 14.50 V
D. 5.12 V

Answer

(a)

Explanation

Energy stored,
`U = 4 xx 10^(20)` eV
` = 4 xx 10^(20) xx1.6 xx 10^(-19)`J
= 64 J
Charge Q = 6.25 C
`:.` Potential difference,
`V' = U/q`
`= 64/6.25`
= 10.24 V