APSC Legal Metrology: Ohmic Conductor Paper 2

With reference to Ohm’s Law, consider the following statements:

1. Ohm’s Law states that the current flowing through a conductor is directly proportional to the voltage applied across its ends, provided the temperature remains constant.
2. A material that follows Ohm’s Law is known as a non-ohmic conductor.

Which of the statements given above is/are correct?

A. 1 only
B. 2 only
C. Both 1 and 2
D. Neither 1 nor 2

Correct Answer: A

Explanation:

• Statement 1 is correct – Ohm’s Law is V = IR, valid when temperature is constant.
• Statement 2 is incorrect – materials that follow Ohm’s Law are ohmic (not non-ohmic).