Neco 2017 Physics Question 40

Practice objective / multiple choice question 40 from the 2017 Neco Physics examination.

Neco 2017 Physics Objective / Multiple Choice Hard Difficulty
Question 40 NECO • 2017 • PHYSICS • objective

A rectangular coil of \(N = 200\) turns and radius \(r = 5.0\) cm rotates uniformly in a uniform magnetic field of magnitude \(B = 0.20\) T. The axis of rotation is perpendicular to the field. The maximum emf induced in the coil is measured to be 12 V. (a) Determine the angular speed \(\omega\) of the coil in rad/s. (b) If the coil has a resistance of 4 \(\Omega\), calculate the average electrical power dissipated in the coil.

Answer Options

Correct Answer A. \omega \approx 38.2 rad/s, P_{avg}=18 W
B. \\omega \approx 50 rad\\/s, P_{avg}=30 W
C. \\omega \approx 45 rad\\/s, P_{avg}=24 W
D. \\omega \approx 30 rad\\/s, P_{avg}=12 W
Correct Answer
A
Correct Option:
\omega \approx 38.2 rad/s, P_{avg}=18 W

About This Question

This is Neco 2017 Physics Question 40. It is one of the objective questions from the 2017 Neco Physics examination.

Difficulty level: Hard .

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