Gce Model Questions Vol1 2025 Physics Question 39

Practice objective / multiple choice question 39 from the 2025 Gce Model Questions Vol1 Physics examination.

Gce Model Questions Vol1 2025 Physics Objective / Multiple Choice Hard Difficulty
Question 39 GCE_MODEL_QUESTIONS_VOL1 • 2025 • PHYSICS • objective

A rectangular coil of 50 turns, each side \(0.20\,\text{m}\), rotates in a uniform magnetic field of magnitude \(0.50\,\text{T}\). The coil starts from rest and rotates through \(90^{\circ}\) in \(0.10\,\text{s}\) with constant angular acceleration. (i) Find the maximum emf induced in the coil during the motion. (ii) If the coil is connected to a \(10\,\Omega\) resistor throughout the motion, calculate the total energy dissipated in the resistor (to two significant figures).

Answer Options

A. (i) 10π V ≈ 31.4 V; (ii) 1.0 J
Correct Answer B. (i) 10π V ≈ 31.4 V; (ii) 2.0 J
C. (i) 12π V ≈ 37.7 V; (ii) 2.5 J
D. (i) 8π V ≈ 25.1 V; (ii) 1.5 J
Correct Answer
B
Correct Option:
(i) 10π V ≈ 31.4 V; (ii) 2.0 J

About This Question

This is Gce Model Questions Vol1 2025 Physics Question 39. It is one of the objective questions from the 2025 Gce Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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