The ring B is coaxial with a solenoid A as shown in figure- As the switch S is closed at t -0- the ring BA- is attracted towards AB- is repelled by AC- is initially repelled and then attractedD- is initially attracted and then repelled

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Byju's Answer

Standard XII

Physics

Lenz's Law

The ring B is...

Question

The ring $B$ is coaxial with a solenoid $A$ as shown in figure. As the switch $S$ is closed at $t = 0$ , the ring $B$

is attracted towards

A

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is repelled by

A

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is initially repelled and then attracted

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is initially attracted and then repelled

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Solution

The correct option is B is repelled by $A$
Current increases with time. So, flux passing through $B$ will increase with time. From Lenz’s law, it should have a tendency to move away from the coil to decrease flux.

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