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WAEC Physics 2014 Objective — Question 44

Question 44 of 50 from the West African Examinations Council (WAEC) Physics 2014 Objective paper, with the correct answer and a full explanation.

A wire of length 100cm has a resistance of 10Ω. If its cross-sectional area is 0.005cm², determine its resistivity.

A. 0.0005 ΩcmCorrect
B. 0.0015 Ωcm
C. 0.0016 Ωcm
D. 0.0700 Ωcm

Explanation

Resistivity ρ = RA/L = (10×0.005)/100 = 0.0005 Ωcm.

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