Draw a schematic diagram showing electromagnetic induction by using two coils and explain the observations.

Draw a schematic diagram showing electromagnetic induction by using tw

1.	Draw a schematic diagram showing electromagnetic induction by using two coils and explain the observations.
Answer» Solution :Taketwo different coils (say P and Q) of insualted copperwirehavinglarges numberof turns. Insert the two coilsover a NON - conducing cylindrical thick paper roll. Connect a batteryand a plug key K in series of COIL - 1(P) . Withcoil- 2 (Q) ALSO givena momentary deflection and then thepointer QUICKLY returnsto its mean position. Now remove the plug from key K. The galvanometer in coil-2(Q)again gives a momentary deflection but in the reverse direction. Moreover, we observe that as soon as current in coil-1 (P) becomes EITHER steady or zero, there is no deflection in galvanometer. From the above experiment, we conclude that an induced current is produced in coil 2 (Q) on account of electromagnetic induction whenever current in coil-1 (P) is changing.