Igcse Model Questions Vol1 2024 Physics Question 40

Practice objective / multiple choice question 40 from the 2024 Igcse Model Questions Vol1 Physics examination.

Igcse Model Questions Vol1 2024 Physics Objective / Multiple Choice Hard Difficulty
Question 40 IGCSE_MODEL_QUESTIONS_VOL1 • 2024 • PHYSICS • objective

A long solenoid of length \(0.50\ \text{m}\) has \(800\) turns and carries a current that varies with time as \(I(t)=2t\ \text{A}\) (where \(t\) is in seconds). (a) Find the magnetic field at the centre of the solenoid at \(t=3\ \text{s}\). (b) A single‑turn rectangular loop of width \(0.10\ \text{m}\) and length \(0.20\ \text{m}\) is placed with its plane perpendicular to the solenoid axis, entirely within the uniform field region. At \(t=3\ \text{s}\) the loop is pulled out of the solenoid at a constant speed of \(0.05\ \text{m s}^{-1}\) and is completely out of the field after \(0.20\ \text{s}\). Determine the average magnitude of the induced emf in the loop during its removal.

Answer Options

Correct Answer A. a) B ≈ 1.2×10⁻² T; b) average emf ≈ 1.2×10⁻³ V (1.2 mV)
B. a) B ≈ 1.2×10⁻¹ T; b) average emf ≈ 1.2×10⁻² V (12 mV)
C. a) B ≈ 9.6×10⁻³ T; b) average emf ≈ 9.6×10⁻⁴ V (0.96 mV)
D. a) B ≈ 2.4×10⁻² T; b) average emf ≈ 2.4×10⁻³ V (2.4 mV)
Correct Answer
A
Correct Option:
a) B ≈ 1.2×10⁻² T; b) average emf ≈ 1.2×10⁻³ V (1.2 mV)

About This Question

This is Igcse Model Questions Vol1 2024 Physics Question 40. It is one of the objective questions from the 2024 Igcse Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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