Igcse Model Questions Vol1 2020 Physics Question 30

Practice objective / multiple choice question 30 from the 2020 Igcse Model Questions Vol1 Physics examination.

Igcse Model Questions Vol1 2020 Physics Objective / Multiple Choice Hard Difficulty
Question 30 IGCSE_MODEL_QUESTIONS_VOL1 • 2020 • PHYSICS • objective

A rectangular coil of \(200\) turns has dimensions \(0.10\,\text{m}\) by \(0.05\,\text{m}\) and rotates uniformly in a uniform magnetic field of \(0.20\,\text{T}\) at a speed of \(60\) revolutions per minute.\ (a) Calculate the peak emf induced in the coil (in volts).\ (b) If the coil terminals are connected across a resistor of \(10\,\Omega\), determine the average electrical power dissipated in the resistor (in watts).\ (c) Assuming the generator operates at the average electrical power found in part (b) with 100 % efficiency, what is the greatest height a \(5.0\,\text{kg}\) mass could be lifted vertically in \(10\) s by the generator?

Answer Options

A. ε_peak ≈ 0.63 V; P_avg ≈ 0.020 W; h_max ≈ 0.004 m
B. ε_peak ≈ 1.00 V; P_avg ≈ 0.050 W; h_max ≈ 0.010 m
C. ε_peak ≈ 2.00 V; P_avg ≈ 0.250 W; h_max ≈ 0.050 m
Correct Answer D. ε_peak ≈ 1.26 V; P_avg ≈ 0.079 W; h_max ≈ 0.016 m
Correct Answer
D
Correct Option:
ε_peak ≈ 1.26 V; P_avg ≈ 0.079 W; h_max ≈ 0.016 m

About This Question

This is Igcse Model Questions Vol1 2020 Physics Question 30. It is one of the objective questions from the 2020 Igcse Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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