Neco 2019 Physics Question 14

Practice objective / multiple choice question 14 from the 2019 Neco Physics examination.

Neco 2019 Physics Objective / Multiple Choice Hard Difficulty
Question 14 NECO • 2019 • PHYSICS • objective

A rectangular coil of \(N=50\) turns, each side \(0.20\,\text{m}\) by \(0.10\,\text{m}\), rotates uniformly in a uniform magnetic field \(B=0.5\,\text{T}\). The axis of rotation is perpendicular to the field and passes through the centre of the coil. The coil rotates at \(60\) revolutions per second and is connected to a resistor of \(R=10\,\Omega\). (a) Find the maximum induced emf. (b) Compute the average power dissipated in the resistor. (c) Determine the mechanical torque required to keep the coil rotating at constant speed.

Answer Options

A. \varepsilon_{max}\approx210 V; P\approx2.1 kW; \tau\approx5.5 N·m
B. \varepsilon_{max}\approx175 V; P\approx1.5 kW; \tau\approx4.0 N·m
Correct Answer C. \varepsilon_{max}\approx188 V; P\approx1.78 kW; \tau\approx4.7 N·m
D. \varepsilon_{max}\approx150 V; P\approx1.2 kW; \tau\approx3.8 N·m
Correct Answer
C
Correct Option:
\varepsilon_{max}\approx188 V; P\approx1.78 kW; \tau\approx4.7 N·m

About This Question

This is Neco 2019 Physics Question 14. It is one of the objective questions from the 2019 Neco Physics examination.

Difficulty level: Hard .

View More Neco 2019 Physics Questions More Neco Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Chat with Support