Electromagnetic Field Theory
A coil of 300 turns is wound on a non magnetic core having a mean circumference of 300 mm and a cross sectional area of 300 mm2. The inductance of the coil corresponding to a magnetizing current of 6 A will be

  113.04 μH.
 3.768 μH.
 1.1304 μH.
 37.68 μH.

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Electromagnetic Field Theory
Magnetostriction is a phenomenon of

 generation of magnetism in electrical conductors.
 change in permeability of ferromagnetic materials during magnetism.
 change in physical dimensions of ferromagnetic materials during magnetism.
 generation of electricity in ferromagnetic materials.

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