WAEC Physics 2017 Objective — Question 40

Question 40 of 50 from the West African Examinations Council (WAEC) Physics 2017 Objective paper, with the correct answer and a full explanation.

Which of the following factors does not affect the electric resistance of a wire?

A. A. Length
B. B. MassCorrect
C. C. Temperature
D. D. Cross-sectional area

Explanation

The electric resistance of a wire does not depend on the mass of the wire, but it depends on (i) temperature of wire (ii) length of wire (iii) cross-sectional area of wire.

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