21. (i) With the help of an activity, explain the method of inducing electric current in a coil with a moving magnet.
State the rule used to find the direction of electric current thus generated in the coil. 5
(ii) Two circular coils-1 and coil-2 are kept close to each other as shown in the diagram.Coil-1 is connected to a battery
and key and coil-2with a galvanometer. State your observation in the galvanometer:
(a) When key k closed ; (b) when key k is opened;
Give reason for your observations.
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