Neco Model Questions Vol1 2020 Physics Question 35

Practice objective / multiple choice question 35 from the 2020 Neco Model Questions Vol1 Physics examination.

Neco Model Questions Vol1 2020 Physics Objective / Multiple Choice Hard Difficulty
Question 35 NECO_MODEL_QUESTIONS_VOL1 • 2020 • PHYSICS • objective

A rectangular conducting loop of total resistance \(2\ \Omega\) consists of a movable rod \(AB\) of length \(0.50\ \text{m}\) and three fixed sides of negligible resistance. The loop lies in a uniform magnetic field of magnitude \(0.20\ \text{T}\) directed into the page. The rod \(AB\) is pulled to the right with a constant horizontal force of \(0.60\ \text{N}\), causing it to move at constant speed. (a) Find the speed \(v\) of the rod. (b) Determine the magnitude of the induced current in the loop. (c) Calculate the magnetic force on the rod and verify that it balances the applied force.

Answer Options

Correct Answer A. v = 120 m/s; I = 6 A; magnetic force = 0.60 N
B. v = 60 m\/s; I = 3 A; magnetic force = 0.30 N
C. v = 100 m\/s; I = 5 A; magnetic force = 0.50 N
D. v = 240 m\/s; I = 12 A; magnetic force = 1.20 N
Correct Answer
A
Correct Option:
v = 120 m/s; I = 6 A; magnetic force = 0.60 N

About This Question

This is Neco Model Questions Vol1 2020 Physics Question 35. It is one of the objective questions from the 2020 Neco Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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