The magnetic susceptibility of annealed iron at saturation is 4224. Find the permeability of annealed iron at saturation `(mu_0 = 4 pi xx 10^-7 SI unit)` .

The susceptibility of annealed iron at saturation is 5500. Find the permeability of annealed iron at saturation.

A short magnetic dipole has magnetic moment 0.5 Am2. Calculate the magnetic induction at a distance of 20 cm from the centre of the magnetic dipole on the axis and the equitorial line [ mu_o = 4pi xx 10^-7 SI unit].

An iron rod of area of cross-section 0.1 m^2 is subjected to a magnetising field of 1000 A/m. Calculate the magnetic permeability of the iron rod. [Magnetic susceptibility of iron = 59.9, magnetic permeability of vacuum = 4pi xx 10^-7 S.I.units]

A short magnetic dipoles has magnetic moment 0.5 Am^2 . Calculate its magnetic field at a distance of 20cm from the center of magnetic dipole on the equatorial line ( mu_0 = 4pi xx 10^-7 SI unit).

A short magnetic dipole has magnetic moment 0.5 Am^2 . Calculate its magnetic field at a distance of 20 cm from the centre of magnetic dipole on (i) the axis (ii) the equatorial line. [ mu_o = 4pi xx 10^-7 SI units] ?

Calculate the magnetic moment of a short magnet which produces magnetic induction of 10^-3 T, at a point along its axis at a distance of 20 cm from its centre [ mu_o = 4pi xx 10^-7 SI unit].

The temperature of the filaments of a 100W electric lamp is 2727^@C . The emissivity of the surface of the filament is 0.086 and its radius is 0.5 mm. Find the length of the filament. sigma = 5.7 xx 10^-8 S.I. units.

Calculate the distance from the centre of a short bar magnet of moment 3 A - m^2 on the equatorial line where the magnitude of magnetic induction is 1.92 xx 10^-5 T [ mu_O = 4pi xx 10^-7 SI unit].