Question

Conductivity =

• A. Resistance^-1
• B. Current^-1
• C. Potential^-1
• D. Resistivity^-1

Answer 1

The Correct Option is D

To solve this question, we need to understand the relationship between conductivity and other electrical properties.

1. Definition of Conductivity:
Conductivity (\( \sigma \)) is the measure of a material's ability to conduct electric current. It is the reciprocal of resistivity (\( \rho \)).

\[ \sigma = \frac{1}{\rho} \]

2. Clarification of Terms:

• Resistance – Property of an object, depends on material and geometry.
• Resistivity – Intrinsic property of a material, independent of shape/size.
• Conductivity – Reciprocal of resistivity.

3. Evaluating the Options:

• (A) \( \text{Resistance}^{-1} \) – Incorrect; that's conductance.
• (B) \( \text{Current}^{-1} \) – Incorrect; unrelated to conductivity definition.
• (C) \( \text{Potential}^{-1} \) – Incorrect.
• (D) \( \text{Resistivity}^{-1} \) – Correct ✔

Final Answer:
The correct answer is (D) Resistivity⁻¹.