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 $B$

• A. is attracted towards $A$
• B. is repelled by $A$
• C. is initially repelled and then attracted
• D. is initially attracted and then repelled

Answer 1

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.