Neco 2019 Physics Question 16
Practice objective / multiple choice question 16 from the 2019 Neco Physics examination.
A rectangular conducting loop of width \(a = 0.20\ \text{m}\) and height \(b = 0.10\ \text{m}\) lies in a uniform magnetic field \(B = 0.5\ \text{T}\) directed into the page. The loop is pulled to the right at a constant speed \(v = 0.05\ \text{m s^{-1}}\) so that it leaves the field. At the instant when only half of the loop remains inside the field, determine the magnitude of the external force that must be applied to keep the motion at constant speed. (The resistance of the loop is \(R = 2\ \Omega\).)
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About This Question
This is Neco 2019 Physics Question 16. It is one of the objective questions from the 2019 Neco Physics examination.
Difficulty level: Hard .
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