Gce Model Questions Vol1 2022 Physics Question 34

Practice objective / multiple choice question 34 from the 2022 Gce Model Questions Vol1 Physics examination.

Gce Model Questions Vol1 2022 Physics Objective / Multiple Choice Hard Difficulty
Question 34 GCE_MODEL_QUESTIONS_VOL1 • 2022 • PHYSICS • objective

A rectangular coil of 50 turns, each side 0.10 m, rotates uniformly in a uniform magnetic field of magnitude 0.20 T. The plane of the coil is initially perpendicular to the field. (i) Determine the angular speed \(\omega\) (in rad s^{-1}) required for the maximum induced emf to be 5 V. (ii) If the coil is connected to a resistor of 10 Ω, calculate the average electrical power dissipated in the resistor. (iii) Assuming no other losses, find the mechanical torque that must be supplied to keep the coil rotating at this speed.

Answer Options

A. ω = 55 rad\/s, power = 1.50 W, torque = 0.030 N·m
B. ω = 60 rad\/s, power = 2.00 W, torque = 0.040 N·m
C. ω = 45 rad\/s, power = 1.00 W, torque = 0.020 N·m
Correct Answer D. ω = 50 rad/s, power = 1.25 W, torque = 0.025 N·m
Correct Answer
D
Correct Option:
ω = 50 rad/s, power = 1.25 W, torque = 0.025 N·m

About This Question

This is Gce Model Questions Vol1 2022 Physics Question 34. It is one of the objective questions from the 2022 Gce Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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