The lead wires should have

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(A) Lead wires are used to connect a power source to a load. To minimize power loss $(P = I^2R)$ and voltage drop $(V = IR)$ across the wires, the res

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Larger diameter and low resistance

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(A) Lead wires are used to connect a power source to a load. To minimize power loss $(P = I^2R)$ and voltage drop $(V = IR)$ across the wires, the resistance $(R)$ of the wires should be as low as possible.Since resistance is given by the formula $R = \rho \frac{L}{A}$, where $\rho$ is resistivity, $L$ is length, and $A$ is the cross-sectional area $(A = \pi r^2)$, to decrease resistance, we need to increase the cross-sectional area $(A)$.Increasing the area means increasing the diameter of the wire.Therefore, lead wires should have a larger diameter to ensure low resistance.

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