A Rowland ring of mean radius 15 cm has 3500 tums of wire wound on a ferromagnetic core of relative permeability 800. What is the magnetic field B in the core for a magnetising current of 1.2 A?

A toroid has a core( non-ferromagnetic) of inner radius 25 cm and outer radius 26cm, around which 3500 turns of a wire wound. If the current in the wires is 11A, what is the magnetic field inside the core of the toroid, and

A toroid has a core( non-ferromagnetic) of inner radius 25 cm and outer radius 26cm, around which 3500 turns of a wire wound. If the current in the wires is 11A, what is the magnetic field in the empty space surrounded by the toroid.

A toroid has a core( non-ferromagnetic) of inner radius 25 cm and outer radius 26cm, around which 3500 turns of a wire wound. If the current in the wires is 11A, what is the magnetic field outside the toroid,

The length of straight solenoid is 10 cm, number of turns is 5000 , current through it is 10 mA and the relative permeability of the material of its 1500. Determine the magnetic intensity H and the magnetic field B on the axis of the solenoid .

2A current is flowing through a circular coil of radius 10 cm, made of insulated wire and having 100 turns. If the conductor is palced parallel to the magnetic field, determine the torque acting on it.(magnetic field=0.2T)

An 1 m long straight solenoid has 1000 number of turns the relative permeability of its core material is 1000. if a current of 1 A passes through the magnetic field along its axis ?