Two wires P and Q are made of the same material

PHYSICS · Subjective · A Level · Physics · Electricity · Electricity

Problem

Two wires P and Q are made of the same material. The wire Q has twice the diameter and half the length as that of wire P. If the resistance of wire P is R, the resistance of the wire Q will be (A) R (B) R2\frac{R}{2} (C) R8\frac{R}{8} (D) 2R

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