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Electromagnetic Field Theory

Electromagnetic Field Theory
A pure inductor is connected across a voltage source. Find the active power drawn by the inductor?

 0
None of these
 either 1 or 2
 maximum

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Electromagnetic Field Theory
Electric field inside a hollow metallic charged sphere is

 zero.
 decreasing towards centre.
 none of above.
 increasing towards centre.

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Electromagnetic Field Theory
The ability of charged bodies to exert force on one another is attributed to the existence of

 electrons.
 electric field.
 protons.
 neutrons.

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Electromagnetic Field Theory
The drawback of Daltons atomic structure is that, it says

 the atoms can neither be created nor be destroyed.
 unique nature of atom.
 most of the volume of an atom is empty space.
 none of these.

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Electromagnetic Field Theory
The property of the coil by which a counter emf is induced in it when the current through the coil changes is known as

 mutual inductance.
 capacitance.
 series aiding inductance.
 self inductance.

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Electromagnetic Field Theory
The force required to seperate two surfaces with a contact area measuring 5 cm by 6 cm, when flux density normal to the surface is 0.8 tesla, will be

 76400 N.
 7640 N.
 76.4 N.
 764 N.

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