Question

Three 2 V cells are connected in series and used as a battery in a circuit.

1. What is the p.d. at the terminals of the battery?
2. How many joules of electrical energy does 1 C gain on passing through
   1. one cell
   2. all three cells?

Answer 1

a. If three cells of 2 volts each are connected in series to make a battery, then the total potential difference between the terminals of the battery will be 6 V.

b. i. Given: p.d. = 2 V

Charged moved = 1 C

We know that,

Work done = p.d. × charge moved

Work done = 2 × 1

Work done = 2 joules

ii. Given: p.d. = 6 V

Charge moved = 1 C

We know that,

Work done = p.d. × charge moved

Work done = 6 × 1

Work done = 6 joules