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Electromagnetic Field Theory

Electromagnetic Field Theory
The radiation pattern of loop antenna is

Semicircle
Circle
Cardoid or Limacon
Elliptical

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Electromagnetic Field Theory
The force on a charge moving with velocity v under the influence of electric and magnetic fields is given by which one of the following

 q(H + V × E).
 q(E +V × H).
 q(E + B × V).
 q(E + V × B).

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Electromagnetic Field Theory
A plane wave magnetic field is represented by Bx = cos(y – ct). The electric and magnetic fields will be zero in the direction

 Ex = Ey = 0, Bx = By = 0.
 Ey = Ez = 0, By = Bz = 0.
 None of these.
 Ex = Ey = 0, By = Bz = 0.

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Electromagnetic Field Theory
Materials subjected to rapid reversals of magnetism should have

 high permeability.
 both a and b.
 low permeability.
 low hysteresis loss.

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

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Electromagnetic Field Theory
A vector field A = p In is given in Cartesian coordinates. In cylindrical coordinates it will be represented as

 A = cosφ Ir.
 A = cosφ Ir - sinφ Ir.
 A = cosφ Ir + sinφ Iφ.
 A = sinφ Ir.

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MORE MCQ ON Electromagnetic Field Theory

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