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A bar magnet is pulled along axis of a c...

A bar magnet is pulled along axis of a coil with uniform velocity with south pole entering into the coil. The sketch of Joule's heat with time is represented by

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
B
`e=-(dphi)/(dt)`
`i=(e)/(R)` where R is resistance
`H=i^(2)Rt`
The emf will induce from zero to some maximum value and then from maximum to zero.
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