Electromagnetic Field Theory
Magnetostriction is a phenomenon of

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

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Electromagnetic Field Theory
Which of following is true for a purely inductive circuit ?

 Reactive power of the circuit is zero.
 Actual power of the circuit is zero.
 Apparent power of the circuit is zero.
 Any capacitance even if present in the circuit will not be charged.

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Electromagnetic Field Theory
According to Coulomb’s law, the force of attraction or repulsion, between to electrical charges is

 inversely proportional to the square of the distance between them.
 directly proportional to the distance between them.
 inversely proportional to the distance between them.
 directly proportional to the square of the distance between them.

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