If D.C. is used, the metal ring lifts up and falls down immediately. Why?

cbse
electromagnetism

#1

The flux linked with metal ring is zero when the switch is on. At that instant there should be a change in flux linked with ring. So the ring raises up and falls down. If the switch is off, the metal ring again raises up and falls down.
There is no change in flux linked with ring when the switch is off.