The magnetic field Band themagneticintensity H in a material are found to be 1.6 T and `1000 frac(A)(m)`, respectively. Calculate the relative permeability 'mu_r' and the susceptibility `x` of the material.

The magnetic susceptibility of bismuth is 2.1xx10^-6 . Calculate relative permeability.

In a biprism experiment, the eye piece is kept at a distance of 1.5 m from the slit and the distance of the 2nd dark band from the central point was found to be 1.2 cm. The sizes of the magnified and diminished images of slits produced by the convex lens are found to be 2.4 cm and 60 cm respectively. Calculate the wavelength of light used.

A magnetic field strength (H) 3 xx 10^3 Am^-1 produces a magnetic field of induction (B) of 12 pi T in an iron rod . The relative permeability of iron is

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 circular coil of 30 turns and radius 8.0 cm carrying a current of 6.0 A is suspended vertically in a uniform horizontal magnetic field of magnitude 1.0 T. The field lines make an angle of 60^@ with the normal of the coil. Calculate the magnitude of the counter torque that must be applied to prevent the coil from turning.

Earth's magnetic field at the equator is approximately 4 xx 10^-5 tesla, R = 6.4 xx 10^ m, mu_o = 4pi xx 10^-7 SI unit. Calculate Earth's dipole moment.

A plano-convex lens fits exactly into plano-concave lens as shown in the figure. Their plane surfaces are parallel to each other. If the lenses are made of different materials of refractive indices 1.6 and 1.5 respectively, if R is the radius of curvature of curved surface of lenses, then the focal length of the combination

(a) A circular coil of 30 turns and radius 8.0 cm carrying a current of 6.0 A is suspended vertically in a uniform horizontal magnetic field of magnitude 1.0 T. The field lines make an angle of 60 ^@ with the normal of the coil. Calculate the magnitude of the counter torque that must be applied to prevent the coil from turning. (b) Would your answer change, if the circular coil in were replaced by a planar coil of some irregular shape that encloses the same area? (All other particulars are also unaltered.)

A magnetizing field of 360A//m produces a magnetic flux density B = 0.6T in a ferromagnetic material. What is its permeability in TmA^-1 ?