Waec Model Questions Vol1 2019 Physics Question 43

Practice objective / multiple choice question 43 from the 2019 Waec Model Questions Vol1 Physics examination.

Waec Model Questions Vol1 2019 Physics Objective / Multiple Choice Hard Difficulty
Question 43 WAEC_MODEL_QUESTIONS_VOL1 • 2019 • PHYSICS • objective

A rectangular conducting loop of width 0.20 m and length 0.30 m is pulled out of a uniform magnetic field of magnitude 0.50 T (directed into the page) at a constant speed of 0.40 m s⁻¹. The side of length 0.30 m remains within the field while the opposite side exits. The loop has a total resistance of 2.0 Ω. Determine (a) the magnitude of the induced emf, (b) the induced current, (c) the magnetic force acting on the moving side of the loop, (d) the mechanical power required to pull the loop, and (e) the total work done to remove the loop completely from the field.

Answer Options

A. ε = 0.090 V; I = 0.045 A; F = 0.0045 N; P = 0.0018 W; work = 9.0×10⁻⁴ J
B. ε = 0.048 V; I = 0.024 A; F = 0.0024 N; P = 0.00096 W; work = 4.8×10⁻⁴ J
Correct Answer C. ε = 0.060 V; I = 0.030 A; F = 0.0030 N; P = 0.0012 W; work = 6.0×10⁻⁴ J
D. ε = 0.075 V; I = 0.0375 A; F = 0.0038 N; P = 0.0015 W; work = 7.5×10⁻⁴ J
Correct Answer
C
Correct Option:
ε = 0.060 V; I = 0.030 A; F = 0.0030 N; P = 0.0012 W; work = 6.0×10⁻⁴ J

About This Question

This is Waec Model Questions Vol1 2019 Physics Question 43. It is one of the objective questions from the 2019 Waec Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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