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qUESTIONS

A magnetising field of 300 Am-1 produces a magnetic flux density (B) = 0.3 T in a ferromagnetic material. What is its permeability in Tm A is?

The magnetic moment produced in a substance of 10^-3 kg is 5 × 10^−7A−m2. If its density is 6 X 10^3 kg/m^3, then the intensity of magnetisation in A/m will be :

A straight wire current I is turned into a circular loop. If the magnitude of magnetic moment associated with the is M, the length of wire will be

A wire of length L carries a current i. If the wire is turned into a circular coil and kept in a uniform magnetic field , the maximum magnitude of torque in the given magnetic field will be

If Mo and Lo denote the orbital angular moment and the angular momentum of the electron due to its orbital motion, then the gyromagnetic ratio is given by

A magnetizing field of 1000 A/m produces a magnetic flux of 2.4 * 10 ^ – 5 Wb in an iron bar of cross-sectional area 0.3c * m ^ 2 The magnetic permeability of the iron bar in SI unit is:

The magnetic moment produced in a sample of 2 gram is 8 x 10-7 A/m2. lf its density is 4g/cm3, then the magnetization of the sample in AM^-1 is

for an electron of charge e and mass m, the gyromagnetic ratio is

Two wires of same length are shaped into a square and a circle. If they carry same current, ratio of the magnetic moment is

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