Question

Find the work done to transfer ${10}^{19}$ electrons from point A to B which are maintained at a potential diffrence of 5 volts.

• A. 8 J
• B. 10 J
• C. 5 J
• D. 1 J

Answer 1

The correct option is A

8 J

We know that, work done, W = qV

Here, charge, q = ne = ${10}^{19}\times 1.6\times {10}^{-19}$ = 1.6 C

Hence, work done, W = $1.6\times 5$ = 8 J