Gce Model Questions Vol1 2022 Physics Question 30
Practice objective / multiple choice question 30 from the 2022 Gce Model Questions Vol1 Physics examination.
A rectangular conducting loop of resistance \(R=2.0\ \Omega\) has length \(l=0.10\ \text{m}\) (horizontal sides) and width \(w=0.05\ \text{m}\) (vertical sides). The loop is pulled at a constant speed \(v\) into a region of uniform magnetic field \(B=0.8\ \text{T}\) directed into the page. The magnetic field region is much larger than the loop. When the leading edge of the loop has entered the field by a distance \(l/2\), the magnetic braking force on the loop balances a constant external pulling force of \(F_{\text{ext}}=0.50\ \text{N}\). Assuming the loop remains planar, find the speed \(v\) (in \(\text{m s}^{-1}\)).
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About This Question
This is Gce Model Questions Vol1 2022 Physics Question 30. It is one of the objective questions from the 2022 Gce Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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