On moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is

- 8 V
- 0.5 V
- 0.1 V
- 2 V

**Solution**

Potential difference between two points is given by

V_{a} - V_{b} = W/q_{0}

Work, W = 2 J

Charge, q_{0} = 20 C

Potential difference = 2/20 = 0.1 V

**The correct option is C.**