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Using Lenz's Law

A bar magnet ...

Question

A bar magnet is thrown along the axis of a ring with speed $v_{0}$ . After sometime, speed of magnet is $v$ , then

A

v > v_{0}

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B

v < v_{0}

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C

v = v_{0}

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D

Information is incomplete

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Solution

The correct option is B $v < v_{0}$
According to Lenz’s law, induced current in loop is such that it opposes the of change in flux; hence, the current is induced such that the magnetic field produced by the induced current repels the approaching magnet.

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