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JEE Mains · Physics · STD 12 -6. Electromagnetic induction
A rectangular loop of wire, supporting a mass \(m\), hangs with one end in a uniform magnetic field \(\overrightarrow B \) pointing out of the plane of the paper. A clockwise current is set up such that \(i > mg/Ba\), where \(a\) is the width of the loop. Then
- A The weight rises due to a vertical force caused by the magnetic field and work is done on the system
- B The weight do not rise due to vertical for caused by the magnetic field and work is done on the system
- C The weight rises due to a vertical force caused by the magnetic field but no work is done on the system
- D The weight rises due to a vertical force caused by the magnetic field and work is extracted from the magnetic field
Answer & Solution
Correct Answer
(C) The weight rises due to a vertical force caused by the magnetic field but no work is done on the system
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