Question

What do you understand by the term internal resistance of a cell?

Answer 1

Step 1: Internal resistance:

Internal resistance is described because the barrier to current flow is provided via way of means of the cells and batteries themselves, ensuing in warmness creation.

The relation between inner resistance $\left(r\right)$and electromotive force $\left(e\right)$in cells is given by,

$e=I(r+R)$

Where $e$is the electromotive force $\left(Volts\right)$,$I$is the current $\left(A\right),R$ is the amount of resistance, and r is the inner resistance in ohms.

Step 2: Determine the term internal resistance of a cell:

When we rearrange the equation above, we get:

$e=IR+Ir$

or

$e=V+Ir$

$V$ is the potential difference (terminal) throughout the cell while the current $\left(I\right)$is flowing via the circuit within the equation above.

The emf $\left(e\right)$ of a cell is constantly more than the potential difference (terminal) throughout the cell.