Question

A coil of induced copper wire is connected to a galvanometer. What will happen if a br magnet ts

(a) pushed into the coil
(b) withdrawn from inside the coil
(c) held stationary inside the coil?

Answer 1

Hey mate..
========

Given , a coil of induced copper wire is connected to a galvanometer.

(a)

When the bar magnet is pushed into the coil, the magnetic field associated with the coil changes which leads to induced potential difference in the coil.

As a result, the galvanometer will get deflected because of the induced current flowing into the copper wire.

(b)

When the bar magnet is withdrawn from inside the coil , Again the same phenomena will take place which will result in the changed magnetic field as well as potential difference.

But this time , the galvanometer will be deflected reversely i.e. in the opposite direction with respect to the first one.

(c)

When the copper wire is held statiomary inside the coil , no current will be induced in the coil because the zero potential difference.

The galvanometer will not be deflected this time.

#racks.

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(ii) When the bar magnet is withdrawn from inside the coil of the insulated copper wire again the current is induced in the coil but this time it is in reverse direction.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