When does the current drawn from a cell becom | vedclass

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(A) The current $I$ drawn from a cell of electromotive force $E$ and internal resistance $r$ connected to an external resistance $R$ is given by the f

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When the external resistance is zero.

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(A) The current $I$ drawn from a cell of electromotive force $E$ and internal resistance $r$ connected to an external resistance $R$ is given by the formula: $I = \frac{E}{R + r}$.To maximize the current $I$,the denominator $(R + r)$ must be minimized.Since the internal resistance $r$ is a constant property of the cell,the current is maximum when the external resistance $R$ is as small as possible.Ideally,when the external resistance $R = 0$ (short circuit condition),the current becomes maximum,given by $I_{max} = \frac{E}{r}$.

When does the current drawn from a cell become maximum?

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