Two coils A and B of insulated wire are kept close to each other. Coil A is connected to a galvanometer while coil B is connected to a battery through a key. What would happen if:

(i) a current is passed through coil B by plugging the key?


(ii) the current is stopped by removing the plug from the key?

(i) When a current is passed through coil B by plugging the key then the Galvanometer pointer moves to one side showing that a current is induced in the coil.

(ii) When the current is stopped by removing the plug from the key, Galvanometer pointer moves to the other side showing that the direction of induced current has been reversed. The phenomenon involved is known as electromagnetic induction.


Explain your answer mentioning the name of the phenomenon involved.


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