Igcse Model Questions Vol1 2025 Physics Question 32

Practice objective / multiple choice question 32 from the 2025 Igcse Model Questions Vol1 Physics examination.

Igcse Model Questions Vol1 2025 Physics Objective / Multiple Choice Hard Difficulty
Question 32 IGCSE_MODEL_QUESTIONS_VOL1 • 2025 • PHYSICS • objective

A rectangular loop of wire of resistance \(2\,\Omega\) has a width of \(0.30\,\text{m}\) and a vertical side length of \(0.40\,\text{m}\). It is pulled to the right at a constant speed of \(0.20\,\text{m s}^{-1}\) into a region of uniform magnetic field \(B=0.5\,\text{T}\) that extends infinitely to the right. Initially the loop is completely outside the field. (a) When \(0.10\,\text{m}\) of the width has entered the field, calculate the induced emf. (b) Determine the magnetic force on the loop at that instant. (c) If the loop is pulled by an external force equal in magnitude to the magnetic force, find the electrical power supplied by the external agent. (d) Compute the total thermal energy dissipated as heat in the resistor after the loop has completely entered the field.

Answer Options

Correct Answer A. a) 0.04 V; b) 0.004 N; c) 8.0×10⁻⁴ W; d) 1.2×10⁻³ J
B. a) 0.02 V; b) 0.008 N; c) 4.0×10⁻⁴ W; d) 6.0×10⁻⁴ J
C. a) 0.06 V; b) 0.002 N; c) 1.2×10⁻³ W; d) 2.0×10⁻³ J
D. a) 0.05 V; b) 0.003 N; c) 1.0×10⁻³ W; d) 1.5×10⁻³ J
Correct Answer
A
Correct Option:
a) 0.04 V; b) 0.004 N; c) 8.0×10⁻⁴ W; d) 1.2×10⁻³ J

About This Question

This is Igcse Model Questions Vol1 2025 Physics Question 32. It is one of the objective questions from the 2025 Igcse Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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