Question

Cube made of a conducting material of side length 10 cm is reshaped to be a wire of

electric resistance 20 ohm , if the resistivity of the material of the cube is 1 × 10-7 ohm.m
Calculate the length of the wire and its radius. (I = 3.14)

Answer 1

The resistivity of the cube is 1 × 10-7 ohm.

The cube has a side length of 10 cm.

The wire has a resistance of 20 ohm.

The length of the wire is 100 cm and the radius is 0.1 cm.