Electromagnetic Field Theory
It was suggested by _____________ that the electric field should be imagined to be divided into tubes of force containing a fixed number of line of force

 all of above.
 Kelvin.
 Faraday.
 Newton.

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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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