Question: When the switch in Figure Q31.13a is closed, a current is set up in the coil and the metal ring springs upward (Fig. Q31.13b). Explain

When the switch in Figure Q31.13a is closed, a current is set up in the coil and the metal ring springs upward (Fig. Q31.13b). Explain this behavior


-Iron core - Metal ring (a) (b) Coutesy of Cental Scientifie Company

-Iron core - Metal ring (a) (b) Coutesy of Cental Scientifie Company

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