Question

The factor(s) affecting the resistance of a conductor is/are:

• A. Length of the conductor
• B. Area of cross-section of the conductor
• C. Material of the conductor
• D. Color of the conductor

Answer 1

Answer: (A), (B), (C)

Material of the conductor

The resistance of a conductor of length, $l$ and cross-sectional area, $A$ is given by $R=\rho \frac{l}{A}$ where $\rho$ is the resistivity. Factors affecting the resistance of a conductor are:

• Length of the conductor - Resistance is directly proportional to the length of the conductor.
• Area of the cross-section of the conductor - Resistance is inversely proportional to the cross section area of the conductor.
• Material of the conductor - Resistance depends on the material of conductor. It is quantified by resistivity. Resistance is directly proportional to resistivity.