Question

A metallic conductor has a resistivity of 2.63 × 10⁻⁸ Ωm at 20°C. If the temperature of the conductor is raised to 200°C, its resistivity will:

विकल्प

• increase

• decrease

• remain unaffected

• none of these

Answer 1

Increase

Explanation:

In metals, higher temperatures increase lattice vibrations, so resistivity increases. Therefore, resistivity increases as temperature rises from 20°C to 200°C, rather than decreasing or remaining unaffected.