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Electromagnetic Field Theory

Electromagnetic Field Theory
The shape of B-H curve for air gap is

 straight line.
 parabola.
 hyperbola.
 ellipse.

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Electromagnetic Field Theory
Parabolic and lens antenna used at

High frequency
Low frequency
Medium frequency
Microwave frequency

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Electromagnetic Field Theory
A conductor is rotating with in a magnetic field. At which of the positions do the peak voltages occur?

 Anywhere.
 At an angle of 45° to the axis of the magnetic field.
 At right angles to the axis of the magnetic field.
 Along the axis of the magnetic field.

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Electromagnetic Field Theory
The inductance of a long solenoid of length 1000 mm wound uniformly with 3000 turns on a cylindrical paper cable of 60 mm diameter is

 3.2 H.
 3.2 mH.
 3.2 µH.
 32 mH.

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Electromagnetic Field Theory
Which of following can induce the maximum induced voltage ?

 1 amp 100 Hz.
 1 amp dc.
 20 amp dc.
 1 amp 1 Hz.

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Electromagnetic Field Theory
In frec space E (z,t) = 103 sin(ωt - βz) uy v/m. What is the value of H (z,t)

  (103/377) sin(ωt - β z)(-ux) A/m.
 (103/377) cos(ωt - β z)(-ux) A/m.
 None of above.
 (103/377) sin(ωt - β z)(-uy) A/m.

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MORE MCQ ON Electromagnetic Field Theory

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