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

1. When three cells with 2 volts respectively are connected in series for the construction of the battery, then the total potential difference between the terminals of the battery will be 6V.

1. For one cell:

Given,

Potential difference = 2V Charge moved = 1C Work done = ?

We know that work done is given as:

Work done = potential difference × charge moved

= 2 × 1 = 2J

Therefore, work done to move a charge of 1C with the potential difference of 2V is 2J. For three cells:

Given,

Potential difference = 6V Change moved = 1C Work done = ?

We know that the work done is given as:

Work done = Potential difference × charge moved

= 6 × 1 = 6J

Therefore, to move 1C charge with a potential difference of 6V, the work done is 6J.