Answer:

a) As an example, if three cells, each having a voltage of 2 volts, are connected in series for the purpose of building a battery, the total potential difference between the terminals of the battery will be 6V.

b) For one cell:

Given,

Potential difference = 2V

Charge moved = 1C

To find, 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

To find, Work done

We know that the work done is given as Work done = Potential difference × charge moved

W.d = 6 × 1 = 6J

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