Question

Calculate the amount of work done to carry `4 C` of charge from a point at `100 V` to a point at `120 V`.

Answer 1

Here, potential difference between two points,` V = 120 V - 100 V = 20 V`
Charge to ber moved, `Q = 4 C`
If `W` is the amount of work done, then `W = Q xx V = (4 C)(20 V) = 80 J`.