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Standard XII

Physics

Lenz's Law

The ring B ...

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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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

The correct option is B is repelled by ACurrent 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.

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

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.