An electrical conductor designed to carry large currents has a circular cross-section…

PHYSICS · Multi-part · CBSE · Physics · Current Electricity · Current Electricity

Problem

An electrical conductor designed to carry large currents has a circular cross-section of diameter

2.50\ \mathrm{mm}

and length

14.0\ \mathrm{m}

. The resistance between its ends is

0.104\ \Omega

. (1) What is the resistivity of the material? (2) If the electric field magnitude in the conductor is

1.28\ \mathrm{V/m}

, what is the total current? (3) If the material has

8.5\times10^{28}

free electrons per cubic metre, find the average drift speed under the conditions of part (b).