Igcse Model Questions Vol1 2019 Physics Question 34

Practice objective / multiple choice question 34 from the 2019 Igcse Model Questions Vol1 Physics examination.

Igcse Model Questions Vol1 2019 Physics Objective / Multiple Choice Hard Difficulty
Question 34 IGCSE_MODEL_QUESTIONS_VOL1 • 2019 • PHYSICS • objective

A rectangular coil of 50 turns, each side 0.10 m, rotates at constant angular speed \(\omega\) in a uniform magnetic field \(B = 0.20\) T. The axis of rotation is perpendicular to the field, so the magnetic flux varies as \(\Phi = N B A \cos(\omega t)\). The coil has a resistance of 5.0 Ω. At the instant when the plane of the coil is parallel to the field, the induced emf is measured to be 3.0 V. (i) Determine the angular speed \(\omega\). (ii) Calculate the maximum current in the coil. (iii) Compute the average electrical power delivered to the resistor over one full rotation.

Answer Options

Correct Answer A. ω = 30 rad s⁻¹; I_max = 0.60 A; P_avg = 0.90 W
B. ω = 20 rad s⁻¹; I_max = 0.40 A; P_avg = 0.40 W
C. ω = 30 rad s⁻¹; I_max = 0.45 A; P_avg = 0.70 W
D. ω = 40 rad s⁻¹; I_max = 0.80 A; P_avg = 1.20 W
Correct Answer
A
Correct Option:
ω = 30 rad s⁻¹; I_max = 0.60 A; P_avg = 0.90 W

About This Question

This is Igcse Model Questions Vol1 2019 Physics Question 34. It is one of the objective questions from the 2019 Igcse Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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