Question

Which of the following statements is/are correct?

1. (A) Resistance is independent of temperature.
2. (B) The more the voltage across a conductor, the more is the resistance.
3. (C) The S.I unit of resistance is ohm.

• A. i only
• B. iii only
• C. ii, iii
• D. All

Answer 1

Answer:

B. iii only

• Resistance is dependent on temperature. The relationship is usually linear over a certain temperature range.

• The more the voltage across a conductor, the more is the current (Ohm's Law: V=IR).

• Resistance is constant unless temperature changes significantly.

• The SI unit of resistance is the ohm