Question

Calculate the work done in moving a charge of 4 coulombs from a point at 220 volts to another point at 230 volts.

Answer 1

Here:
Potential difference, V = 230 − 220 = 10 V
Charge moved, Q = 4 C
So, using the relation V = W/Q, we have:
W = V x Q = 10 x 4 = 40 J