An iron rod of length 0.5 m, radius 0.02 m having relative permeability 120 is placed inside a long solenoid carrying a current of 0.8 A. If the solenoid has 250 turns `m^-1`, find the magnetic dipole moment acquired by the iron rod.

An iron rod of length 0.5 m, radius 0.02 m having relative permeability 120 is placed inside a long solenoid carrying a current of 0.8 A. If the solenoid has 250 turns m^-1 , find the intensity of magnetisation

An iron rod of volume 10^-4m^3 and relative permeability 1000 is placed inside a long solenoid wound with 5 turns/cm. If a current of 0.5A is passed through the solenoid, find the magnetic moment of the rod.

A 3.0 cm wire carrying a current of 10 A is placed inside a solenoid perpendicular to its axis. The magnetic field inside the solenoid is given to be 0.27 T. What is the magnetic force on the wire?

A copper rod of length 0.18 m is moving with a uniform velocity 10 ms^-1 parallel to a long straight wire carrying a current of 5.0 A. The rod itself is perpendicular to the wire with its ends at distances 0.01 m and 0.2 m from it. Calculate the e.m.f. induced in the rod.

A circular coil of 200 turns and radius 0.2 m carries a current of 14 A. What is the magntitude of magnetic moment associated with the coil?

Mangetic field intensity at the centre of a coil of 50 turns, radius 0.5 m and carrying a current of 2 A is

A straight horizontal conducting rod of length 0.45 m and mass 60 g is suspended by two vertical wires at its ends. A current of 5.0 A is set up in the rod through the wires. What magnetic field should be set up normal to the conductor in order that the tension in the wires is zero?

A solenoid of length 1 m and 3 cm in diameter has five layers of winding of 850 turns each and carries a current of 5 A. What is the magnetic field thorugh a cross-sectional end of the solenoid of the solenoid at its centre.