Question

The internal resistance of a primary cell depends on

• A. the concentration of solution
• B. the current drawn from the cell
• C. the distance between the electrodes of the cell
• D. all of the above

Answer 1

The correct option is D all of the above

The primary cell is the DC source of current whose action depends on the chemical changes taking place in it. The opposition experienced by the current during its passage within the cell known as internal resistance. It is depends on the separation of electrodes , size and area of the electrodes.

Internal resistance $r=\frac{V}{I}R$ so it is also depend on the current I drawn from cell.