Question

A coil of copper wire is connected to a galvanometer. What would happen if a bar magnet is (a)Pushed into the coil with its north pole entering first? (b)Pulled out of the bar magnet (c) Held stationary inside the coil

Answer 1

Answer:

A copper wire (conductor) is connected with a Galvanometer. When a bar magnet is pushed into the coil with the North Pole entering first, the side of the coil near the north pole will develop North polarity.

Answer 2

$\huge\bold\red\bigstar{AnswEr}$

When a coil of insulated copper wire is connected to a galvanometer, following observations will take place for each option:

(I) If a bar magnet is pushed into the coil, an electric current will be induced in coil due to electromagnetic induction.

(ii) If a bar magnet is withdrawn from inside, again current will be induced in the copper wire due to electromagnetic induction but this time the direction of current will be reverse in galvanometer.

(iii) If a bar magnet is held stationary inside the coil then no current is induced and therefore there is no deflection in the galvanometer.