Question

The resistance of a metallic wire is:

Options

• directly proportional to its length

• inversely proportional to its area of cross-section

• nature of the material of wire

• all of these

Answer 1

All of these

Explanation:

From $$R = \rho \frac{l}{A}$$, resistance is directly proportional to length, inversely proportional to the area of the cross-section, and depends on the material of the wire. Hence, all statements are correct.