Question

Identify the correct statement(s) from among the following?

1. a) Resistivity of a material is dependent on the nature of the material.
2. (b) Resistivity of a material is independent of the area of cross section.
3. (c) Resistivity of a pure metal is more than its alloy.

• A. None of these
• B. ii only
• C. i only
• D. i, ii

Answer 1

Answer:

D. i, ii

Alloys have higher resistivity than pure metals due to the disruption of electron flow by impurities. Statement (c) is incorrect.