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(B) The power or energy drawn from a cell is given by $P = \frac{V^2}{R_{eq}}$,where $V$ is the voltage of the cell and $R_{eq}$ is the equivalent res

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(B) The power or energy drawn from a cell is given by $P = \frac{V^2}{R_{eq}}$,where $V$ is the voltage of the cell and $R_{eq}$ is the equivalent resistance of the circuit.To draw maximum energy,the equivalent resistance $R_{eq}$ must be minimum.Let each resistance be $R$.For option $A$: $R_{eq} = (R/2) + (R/2) = R$.For option $B$: $R_{eq} = R/4$.For option $C$: $R_{eq} = R + R + R + R = 4R$.For option $D$: $R_{eq} = (R/3) + R = 4R/3$.Comparing the values,the minimum equivalent resistance is $R/4$,which corresponds to the parallel arrangement shown in option $B$.

Which arrangement of four identical resistances should be used to draw maximum energy from a cell of voltage $V$?

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