A magnetic field B is confined to a region r ≤ a and points out of the paper (the z…
Physics · Class 12 · CBSE — Electromagnetic Induction
A magnetic field B is confined to a region r ≤ a and points out of the paper (the z-axis), r = 0 being the centre of the circular region. A charged ring (charge = q) of radius b(b > a) and mass m lies in the x-y plane with its centre at the origin. The ring is free to rotate and is at rest. The magnetic field is brought to zero in time Δt. The angular velocity ω of the ring after the field vanishes, is
Answer
(C)
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