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Problems on Magnetic Materials….

Problems on Magnetic Materials…. A circular loop of copper having a diameter of 10cm carries a current of 500mA. Calculate the magnetic moment associated with the loop. A Paramagnetic material has 10 28 atoms/m 3 . Its susceptibility at 350K is 2.8X10 -4 . Calculate the susceptibility at 300K.

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Problems on Magnetic Materials….

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  1. Problems on Magnetic Materials…. • A circular loop of copper having a diameter of 10cm carries a current of 500mA. Calculate the magnetic moment associated with the loop. • A Paramagnetic material has 1028 atoms/m3. Its susceptibility at 350K is 2.8X10-4. Calculate the susceptibility at 300K. • The magnetic field in the interior of a central solenoid has the value of 6.5X10-4 Tesla when solenoid is empty. When it is filled with Iron, the field becomes 1.3Tesla. Find the relative permeability of Iron.

  2. Find the relative permeability of a Ferro-magnetic material if a field of strength 220amp/m produces a magnetization 3300amp/m in it. The magnetic flux intensity in a piece of ferric oxide is 106 A/m. If the susceptibility of the material is 1.5X10-3, calculate the magnetization of the material and flux density. A paramagnetic material has a magnetic field intensity of 104A/m. If the susceptibility of the material at room temperature is 3.7X10-3, calculate the magnetization and flux density in the material.

  3. Calculate Ms for iron with lattice parameter 2.866 A° having BCC structure. • Ni has FCC structure with lattice parameter as 3.52 A°. The magnetic moment of Ni atom is 0.6 Bohr magneton. Calculate the saturation mag. of Ni. MS = 0.6 µB N

  4. The MS for Co is 14.48X105 A/m given that density of Co is 8900 Kg/m3 and its atomic weight is 59. Calculate the spin magnetic moment of Co atom in terms of Bohr magneton. • The Ms for iron is 1750KA/m. calculate net magnetic moment for Fe atom in the crystal. • Determine Hysteresis loss per cycle with loop has an area 100 units, When the axes are drawn in units of 0.01 Web/m2 and 40A/m.

  5. Calculate (a) The saturation magnetization (b) The saturation flux density for nickel, which has a density of 8.9 gm/cm2. Atomic weight=58.71gm/mol.

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