Answer to Question #151201 in Electricity and Magnetism for Fatima

Question

Which of the following factors does NOT affect the resistance of a metallic conductor at
constant temperature?
A. Type of the conductor.
B. Length of the conductor.
C. Surface area of the conductor.
D. Cross-sectional area of the conductor.

Answer 1

$R=\frac{\rho l}{S}.$

Resistance $R$ depends on type of the conductor $\rho$ (A), length of the conductor $l$ (B), cross-sectional area of the conductor $S$ (D).

And does not depend on surface area of the conductor (C).