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Consider a metal ring kept on top of a f...

Consider a metal ring kept on top of a fixed solenoid (say on a carboard) The centre of the ring coincides with the axis of the solenoid. If the current is suddenly switched on then

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In the same Fig. when current in the solenoid is suddenly switched off, magnetic flux linked with the solenoid and hence with metal ring decreases. Current induced in the metal ring is clockwise, i.e, in the same direction as the solenoid current. They will attract each other. The metal ring, therefore, will remain on the cardboard. However, reaction of cardboard on the ring will increase.
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