On moving a charge of 20 coulombs by 2 cm, 2 J of work is done

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

  1. 8 V
  2. 0.5 V
  3. 0.1 V
  4. 2 V

Solution

Potential difference between two points is given by

Va - Vb = W/q0

Work, W = 2 J

Charge, q0 = 20 C

Potential difference = 2/20 = 0.1 V

The correct option is C.