Electromagnetic Field Theory
The effective reactance of an inductive coil

 none of these.
 increases because of stray capacitance as the frequency increases.
 decreases because of stray capacitance as the frequency increases.
 remains same irrespective of the frequency.

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Electromagnetic Field Theory
If an electric current carrying coil is placed in a uniform magnetic field in the direction of magnetic induction, then

 the net force and torque are both finite.
 the net force and torque on the coil are both zero.
 the net force is zero but torque is finite.
 the net force is finite but torque is zero.

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Electromagnetic Field Theory
Magnetostriction is a phenomenon of

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

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