One Kg of copper is drawn into a wire of 1mm diameter and a wire of 2 mm diameter. The resistance of the two wires will be in the ratio

One Kg of copper is drawn into a wire of 1mm diameter and a wire of 2 mm diameter. The resistance of the two wires will be in the
ratio

1 Answers

49
Subhomoy Bakshi ·

V=L1A1=L2A2

given A2=4A1

So, L2=L14

R1:R2 = ρL1A1:ρL2A2 = 16:1

Your Answer

Close [X]