Question

Electrical resistivity of a given metallic wire depends upon

• A. its length
• B. its thickness
• C. its shape
• D. nature of the material

Answer 1

The correct option is D

nature of the material

Electrical resistivity:

1. The electrical resistivity of a given metallic wire depends on the number density of free electrons in the conductor which is the nature of the material, that is the number of free electrons per unit volume.
2. It also depends on the temperature of the conductor.
3. It also depends on the nature of the material.

Hence, option(D) is correct.