Question

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

• A. 8 J
• B. 10 J
• C. 5 × 10¹⁹ J
• D. 1 J

Answer 1

The correct option is A

8 J

q = ne

q = ${10}^{19}$ $\times$ 1.6 $\times$ ${10}^{-19}$ = 1.6

We know, V = $\frac{W}{Q}$​

W = qv

W = 1.6 $\times$ 5 = 8 J