Answer:
a) The relation between potential difference, work done, and charge moved: Potential difference = (Work done)/(Charge moved)
b) Given information in question:
V1 = 220V
V2 = 230V
Charge moved = 4C
To find, Potential difference = ?
We know that potential difference is:
Potential difference = V2 – V1
= 230 – 220 = 10
Work done = Potential difference × charge moved
= 10 × 4 = 40J
Therefore, the work done is 40J to move charges.