Medium
For a cell with non-zero (finite) internal resistance,write the relation between the terminal voltage $(V)$ and the electromotive force $(E)$ of the cell.
(N/A) The terminal voltage $(V)$ of a cell is the potential difference across its terminals when it is delivering current $(I)$ to an external circuit.
Let $E$ be the electromotive force (emf) of the cell and $r$ be its internal resistance.
When the cell is discharging,the potential drop across the internal resistance is given by $Ir$.
The terminal voltage is the emf minus the potential drop across the internal resistance.
Thus,the relation is: $V = E - Ir$.
Let $E$ be the electromotive force (emf) of the cell and $r$ be its internal resistance.
When the cell is discharging,the potential drop across the internal resistance is given by $Ir$.
The terminal voltage is the emf minus the potential drop across the internal resistance.
Thus,the relation is: $V = E - Ir$.
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