Question

20. A coil made of insulated copper wire is connected to a galvanometer.
What happened ifa bar magnet is
(i) Push towards the coil❓
(ii)Withdrawn from inside the coil?
(iii) Held stationary inside the coil?
(iv) What is the phenomenon involved in this procedure?​

Answer 1

Answer -

1.Galvanometer deflect

2.Galvanometer deflect

3.No change in galvanometer

4.Electromagnetic induction

Answer 2

$\huge\underline\mathfrak\blue{Answer}$

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(ii) When the bar magnet is withdrawn from inside the coil of the insulated copper wire again the current is induced in the coil but this time it is in reverse direction.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