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Electromagnetic Field Theory

Electromagnetic Field Theory
A voltage waveform V(t) = 12t2 is applied across a 1H inductor for t = 0, with initial current through it being zero. The current through the inductor for t = 0 is given by

 24t.
 4t3.
 12t3.
 12t.

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Electromagnetic Field Theory
As a result of reflection from a plane conducting wall, electromagnetic waves acquire an apparent velocity greater than the velocity of light in space. This is called the

 phase velocity.
 group velocity.
 velocity of propagation.
 normal velocity.

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Electromagnetic Field Theory
Midway between two equal and similar charges, a third equal and similar charge is placed, then this third charge will

 remain in stable equilibrium.
 be in unstable equilibrium.
 not be equilibrium.
 will move out of the field of influence of two charges.

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Electromagnetic Field Theory
RF inductor are characterized by

 high current rating and low resistance.
 low current rating and low resistance.
 high current rating and high resistance.
 low current rating and high resistance.

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Electromagnetic Field Theory
Conductor is constant and field is varying then emf will be induced. This principle is called

 static induced emf.
 dynamically induced emf.
None of these
 virtually induced emf.

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Electromagnetic Field Theory
A metal sphere with 1 m radius and a surface charge density of 10 coulombs/m2 is enclosed in a cube of 10 m side. The total outward electric displacement normal to the surface of the cube is

 None of above.
 5 C.
 10 C.
 40π C.

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MORE MCQ ON Electromagnetic Field Theory

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