Two wires P and Q are made of the same material

PHYSICS · Single correct · CBSE · Physics · Electricity · Electricity

Problem

Two wires P and Q are made of the same material. Wire P is 1 m long with radius 0.3 mm, while wire Q is 2 m long with radius 0.6 mm. What is the ratio of their resistances RP:RQR_P : R_Q? (a) 1:21 : 2 (b) 1:11 : 1 (c) 2:12 : 1 (d) 4:14 : 1

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