Igcse Model Questions Vol1 2020 Physics Question 33

Practice objective / multiple choice question 33 from the 2020 Igcse Model Questions Vol1 Physics examination.

Igcse Model Questions Vol1 2020 Physics Objective / Multiple Choice Hard Difficulty
Question 33 IGCSE_MODEL_QUESTIONS_VOL1 • 2020 • PHYSICS • objective

A rectangular coil of 50 turns has dimensions 0.10 m by 0.20 m. It rotates at a constant speed of 300 rev min⁻¹ in a uniform magnetic field of 0.05 T, the axis of rotation being perpendicular to the field. (a) Find the maximum induced emf in the coil. (b) If the coil is connected to a 10 Ω resistor, calculate the peak current. (c) Determine the maximum torque on the coil when the plane of the coil is initially parallel to the field at t = 0.

Answer Options

A. Maximum emf ≈ 1.40 V; peak current ≈ 0.14 A; maximum torque ≈ 7.0×10⁻³ N·m
B. Maximum emf ≈ 1.20 V; peak current ≈ 0.12 A; maximum torque ≈ 6.5×10⁻³ N·m
C. Maximum emf ≈ 1.80 V; peak current ≈ 0.18 A; maximum torque ≈ 8.5×10⁻³ N·m
Correct Answer D. Maximum emf ≈ 1.57 V; peak current ≈ 0.16 A; maximum torque ≈ 7.9×10⁻³ N·m
Correct Answer
D
Correct Option:
Maximum emf ≈ 1.57 V; peak current ≈ 0.16 A; maximum torque ≈ 7.9×10⁻³ N·m

About This Question

This is Igcse Model Questions Vol1 2020 Physics Question 33. It is one of the objective questions from the 2020 Igcse Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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