Question

1) A student inserts a bar magnet in the coil. The student observes deflection in the
galvanometer connected to the coil. What will happen if the magnet is continuously getting in and out of the coll?
(a) the current induced in the coil will increase
(b) the current will change its direction continuously
(c) the magnetic field will create a motion in the coil
(d) the magnetic field of the bar magnet would keep decreasing.

justify your answer!!​

Answer 1

according to me it will be c option

Answer 2

The correct answer is option (b) the current will change its direction continuously.

Explanation:

• If the magnet is continuously getting in and out of the coll the current will change its direction continuously.
• When a coil of wire and a bar magnet are moved in relation to each other, an electric current is generated.
• This current is generated because the strength of the field at the location of the coil changes.
• This current is an induced current and the emf that generates it is an induced emf.