a. Explain what is meant by the internal resistance of a cell.

b. When a cell is connected in series with a resistor of 2.00 Ω there is a current of 0.625 A. If a second resistor of 2.00 Ω is put in series with the first, the current falls to 0.341 A.

Calculate:

i. The internal resistance of the cell

ii. The e.m.f. of the cell.

c. A car battery needs to supply a current of 200 A to turn over the starter motor. Explain why a battery made of a series of cells of the type described b would not be suitable for a car battery.