Question

A coil of insulated copper is connected to a galvanometer. What will
happen it a ban magnet is :
(i) Pushed into the coil?
(ii) Withdrawn from the coil?
(iii) Held stationary inside coil?

Answer 1

A coil of insulated copper is connected to a galvanometer.
When a bar magnet is :

Pushed into the coil, the magnetic flux linked with the coil increases and there will  be induced current which is indicated by deflection in magnet.

When magnet is withdrawn from the coil means when magnet is moved away , the magnetic flux linked with coil decreases and induced current will be produced which will be indicated by deflection in galvanometer.

When magnet is held stationary, no change in magnetic flux linked with coil so no current will be produced.
 

Answer 2

Heya Helper ! Here's your answer .

(i) When magnet is pushed near a bar magnet then it induces current due to electromagnetic induction.

(ii) When the bar magnet is withdrawn from inside the coil of the insulated copper wire again the current is induced in the coil but this time it is in reverse direction.


(iii) When a bar magnet is held stationary inside the coil then no current is induced that’s why galvanometer will show no deflection. 

Thanks :)