Question

the masses of three copper wires are in ratio 1: 5 : 3 and there lengths are in ratio 1:2:3 the ratio of there electrical resistances is

Answer 1

Explanation:

Masses of 3 wires of same metal are in the ratio 1:2:3 and their lengths are in the ratio 3:2:1. The electrical resistances are in ratio. ⇒R1:R2:R3=91:42:13=27:6:1.