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Question: Answered & Verified by Expert
A rectangular loop of wire, supporting a mass $m$, hangs with one end in a uniform magnetic field $\vec{B}$ pointing out of the plane of the paper. A clockwise current is set up such that $i>m g / B a$, where $a$ is the width of the loop. Then :

PhysicsMagnetic Effects of CurrentJEE MainJEE Main 2013 (23 Apr Online)
Options:
  • 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.
Solution:
1893 Upvotes Verified Answer
The correct answer is:
The weight rises due to a vertical force caused by the magnetic field but no work is done on the system.
No Solution Available

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