Question

State the factors on which the internal resistance of a cell depends.

Answer 1

Factors on which internal resistance of a cell depends:

Surface Area:

1. When the surface area of the contact point of electrolyte and electrode is more, the internal resistance will be less.
2. The internal resistance and the surface area of contact are inversely proportional.

Distance:

1. When the anode and cathode are placed apart, the internal resistance will be more.
2. If they are closer together the internal resistance will be less.
3. Hence they are directly proportional.

Electrolyte:

1. The internal resistance is also affected by the concentration, temperature, and nature of the electrolyte.
2. When the concentration is less the internal resistance increases.
3. If the temperature rises, then the internal resistance will also rise.