Neco Model Questions Vol1 2025 Physics Question 23

Practice objective / multiple choice question 23 from the 2025 Neco Model Questions Vol1 Physics examination.

Neco Model Questions Vol1 2025 Physics Objective / Multiple Choice Hard Difficulty
Question 23 NECO_MODEL_QUESTIONS_VOL1 • 2025 • PHYSICS • objective

A rectangular conducting loop of resistance \(2\ \Omega\) has dimensions \(0.10\ \text{m}\) (width) by \(0.20\ \text{m}\) (length). It is pulled at constant speed into a uniform magnetic field of magnitude \(0.5\ \text{T}\) directed into the page. The loop is initially completely outside the field and becomes fully inside after \(0.4\ \text{s}\). Determine (a) the speed of the loop, (b) the magnitude of the induced current while the loop is partially inside, (c) the magnetic force acting on the loop during this interval, and (d) the mechanical power required to pull the loop at constant speed. Give your answers in SI units, using appropriate significant figures.

Answer Options

Correct Answer A. v = 0.5 m/s; I = 0.0125 A; F = 1.25×10⁻³ N; P = 6.3×10⁻⁴ W
B. v = 0.5 m/s; I = 0.0125 A; F = 2.0×10⁻³ N; P = 8.0×10⁻⁴ W
C. v = 0.6 m/s; I = 0.015 A; F = 1.5×10⁻³ N; P = 7.5×10⁻⁴ W
D. v = 0.4 m/s; I = 0.010 A; F = 1.0×10⁻³ N; P = 5.0×10⁻⁴ W
Correct Answer
A
Correct Option:
v = 0.5 m/s; I = 0.0125 A; F = 1.25×10⁻³ N; P = 6.3×10⁻⁴ W

About This Question

This is Neco Model Questions Vol1 2025 Physics Question 23. It is one of the objective questions from the 2025 Neco Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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