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

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

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Electromagnetic Field Theory
Which of the following statement is correct for divergence of electric and magnetic flux densities?

 These are zero for static densities but non zero for time varying densities.
 It is zero for the electric flux density.
 Both are zero.
 It is zero for the magnetic flux density.

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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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