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A metalic ring is dropped down, keeping ...

A metalic ring is dropped down, keeping its plane perpendicular to a constant and horizontal magnetic field. The ring enters the region of mangetic fied at `t=0` and completely emerges out `t= Ts`. The current in the ring varies as:

A

B

C

D

Text Solution

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The correct Answer is:
D
During free fall of ring through a magnetic field,when ring enters the consrant and horizontal magnetic field, the induce current flows in the ring in such a direction that opposes the cause producing it. Now when ting leaves the magnetic field, again current is induced in the ring but in opposite direction. also during the stay of ring completly in the field there is no induction. hence, corrent graph will be (d).
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