Question

If $4\times {10}^{20}eV$ is required to move a charge of $0.25C$ between two points, the potential difference between these two points is:

• A. $256V$
• B. $\frac{1}{256}V$
• C. $256\times {10}^{+19}V$
• D. $250V$

Answer 1

The correct option is A $256V$

$W=q\Delta V$
$\Rightarrow 4\times {10}^{20}\times 1.6\times {10}^{-19}=0.25\times \Delta V$
$\Rightarrow \Delta V=16\times 1.6\times 10$
$\Rightarrow \Delta V=256V$