In the following diagram, two coils were wound on a soft iron ring 1
(separated from each other). The coil X is connected to a battery and
a switch K. A galvanometer is attached to the coil Y.
Initially the key is not inserted in the circuit. Later the key is inserted.
What are the two observations that can be noted from the galvanometer reading?
Answers
Two coils were wound on a soft iron ring 1 (separated from each other). The coil X is connected to a battery and a switch K. A galvanometer is attached to the coil Y. Initially the key is not inserted in the circuit. Later the key is inserted.
observations :
Explanation : Two circular coils x and y are placed side by side close to each other. Coil X is connected to the battery and a switch S whereas coil Y is connected to galvanometer G.
case 1: Initially when the key is not inserted in the circuit, we don't see any deflection in the galvanometer attached to coil Y.
Case 2:Let us pass current in coil x by pressing the switch. As soon as we pass current in coil, the pointer of the galvanometer attached to coil Y shows a deflection, but quickly returns to zero position.
On switching on the current in Coil x, an electric current is induced in Coil Y momentarily. If current is kept ON in coil x, nothing happens in the galvanometer of coil Y.
Conclusion :
we can conclude that whenever the current in the coil x is changing then an electric current is induced in the near by Coil Y.
Coil X which causes induction is called as Primary coil whereas Coil Y in which current is induced is known as Secondary coil
