Waec Model Questions Vol1 2019 Physics Question 50

Practice objective / multiple choice question 50 from the 2019 Waec Model Questions Vol1 Physics examination.

Waec Model Questions Vol1 2019 Physics Objective / Multiple Choice Hard Difficulty
Question 50 WAEC_MODEL_QUESTIONS_VOL1 • 2019 • PHYSICS • objective

A single‑turn rectangular coil of dimensions 10 cm by 5 cm rotates with an angular speed of 120π rad s⁻¹ about an axis through its centre and parallel to the 10 cm side, in a uniform magnetic field of 0.20 T. The coil has a resistance of 2 Ω. At the instant when the plane of the coil makes an angle of 30° with the magnetic field, determine (a) the magnitude of the induced emf, (b) the induced current, and (c) the magnetic torque on the coil at that instant.

Answer Options

A. emf = 1.88×10⁻² V, current = 9.42×10⁻³ A, torque = 4.71×10⁻⁶ N·m
B. emf = 1.50×10⁻¹ V, current = 7.50×10⁻² A, torque = 3.75×10⁻⁵ N·m
Correct Answer C. emf = 1.88×10⁻¹ V, current = 9.42×10⁻² A, torque = 4.71×10⁻⁵ N·m
D. emf = 2.12×10⁻¹ V, current = 1.06×10⁻¹ A, torque = 5.30×10⁻⁵ N·m
Correct Answer
C
Correct Option:
emf = 1.88×10⁻¹ V, current = 9.42×10⁻² A, torque = 4.71×10⁻⁵ N·m

About This Question

This is Waec Model Questions Vol1 2019 Physics Question 50. It is one of the objective questions from the 2019 Waec Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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