A bar magnet is demagnetized by inserting it inside a solenoid of length 0.2 m, 100 turns, and carrying a current of 5.2 A. The coercivity of the bar magnet is :

A bar magnet is demagnetized by inserting the inside a solenoid of length 0.2 m, 100 turns and carrying a current of 5.2 A. The corecivity of the bar magnet is.

A solenoid of length 50cm, having 100 turns carries a current of 2.5A. Find the magnetic field at one end of the solenoid.

A solenoid of length 50cm, having 100 turns carries a current of 2.5A. Find the magnetic field in the interior of the solenoid.

A solenoid of 150 cm length having 300 turns carries a current of 4A. Find the magnitude of the magnetic field inside the solenoid.

A long solenoid of 50 cm length having 100 turns carries a current of 2.5A. The magnetic field at centre of solenoid is:

A long solenoid of 50 cm length having 100 turns carries a current of 2.5A. The magnetic field at centre of solenoid is:

The coercivity of a bar magnet is 120A//m . It is to be demagnetised by placing it inside a solenoid of length 120cm and number of turns 72. The current (in A) flowing through the solenoid is:

The coercivity of a bar magnet is 120A//m . It is to be demagnetised by placing it inside a solenoid of length 120cm and number of turns 72. The current (in A) flowing through the solenoid is:

A bar magnet having coercivity 4 xx 10^(3) Am^(-1) is demagnetised by inserting it inside a solenoid 10 cm long and having 50 turns. The current that should be sent through the solenoid is