Electromagnetic Field Theory
Two coils have inductances L1 = 1200 mH and L2 = 800 mH. They are connected in such a way that flux in the two coils aid each other and inductance is measured to be 2500 mH, then Mutual inductance between the coils is ___________ mH.

 225.
 150.
 250.
 145.

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Electromagnetic Field Theory
Magnetostriction is a phenomenon of

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

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Electromagnetic Field Theory
A wire carrying current is bent in the form of a circular loop. Then the magnetic field around each portion of the wire will be

 perpendicular to the circumference of the wire.
 parallel to half portion and perpendicular for the other half.
 none of above.
 parallel to the plane of the wire.

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