WAEC Physics 2021 Objective — Question 49
Question 49 of 50 from the West African Examinations Council (WAEC) Physics 2021 Objective paper, with the correct answer and a full explanation.
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49. Which of the following factors is not among those that determine the resistance of a wire?
- A. Its massCorrect
- B. Its cross-sectional area
- C. Its length
- D. Its material
Explanation
Resistance R=ρl/A depends on the wire's length, cross-sectional area and resistivity (material) — not directly on its mass.
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