The number of turns of solenoid is 800 per meter, If it carry a current of 1.8A. Calculate magnetic intensity and magnetisation. Given relative permiability `mur = 400`

Calculate the magnetic field due to a circular coil of 100 turns, radius 30 cm, carrying a current of 10 A, (i) at the centre and (ii) at a point 40 cm away from the centre on its axis.

Two parallel Co-axial Coils of equal radius R and- numbers of turn N carrying equal currents I in same direction.are separated by a distance | R. Show that the magnetic field intensity B on the axis around the mid point between the coils is uniform over a very small distance as compared to R and is given by- B = (4/5)^(3/2) (mu_0IN)/R

A coil of 200 turns has a cross-sectional area 900 mm It carries a current of 2 ampere. The plane of the coil is perpendicular to the uniform magnetic field of 0.5T. Calculate : magnetic moment

A coil of 200 turns has a cross-sectional area 900 mm It carries a current of 2 ampere. The plane of the coil is perpendicular to the uniform magnetic field of 0.5T. Calculate : torque acting on the coil