Question

The resistance of a thin wire in comparison of a thick wire of the same material

• A. Is low
• B. Is equal
• C. Depends upon the metal of the wire
• D. Is high

Answer 1

The correct option is D Is high

Resistance of wire $R=\rho \frac{L}{A}$ $⟹R\propto \frac{1}{A}$ $⟹R\propto \frac{1}{r^2}$ where $r$ is the radius of the wire.

Thus resistance of thin wire is more that that of thick wire of same material and same length.