Question

Three 2 V cells are connected in series and used as a battery in a circuit.
(a) What is the p.d. at the terminals of the battery ?
(b) How many joules of electrical energy does 1 C gain on passing through (i) one cell (ii) all three cells ?

Answer 1

Hi Friends,

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

(b) (i) Given:

p.d. = 2V,

Charge moved = 1C

We know that

Work done = p.d. x charge moved

= 2 x 1

Work done = 2 joules (J)

(ii) Given:

p.d. = 6V,

Charge moved = 1C

Work done = p.d. x charge moved

= 6 x1

Work done = 6 joule. (J)

Answer 2

Potential difference of 1 cell = 2 v

Therefore,

Potential difference of 3 cells = 3*2 = 6 v

hence,

potential difference at the terminals of battery= 6 v