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Electromagnetic Field Theory

Electromagnetic Field Theory
The electric flux is given D = (2y2 + z) Ix + 4xy Iy + x Iz C/m2. The volume charge density at point (-1, 0, 3) is

 - 4 C/m3.
 - 8 C/m3.
 0 C/m3.
 - 2 C/m3.

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Electromagnetic Field Theory
Which of the following is multiband HF receiving antenna?

Folded dipole
Square loop
Log-periodic
Conical horn

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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?

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

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Electromagnetic Field Theory
An infinite sheet has a charge density of 150 μ C/m. The flux density in μ C/m 2 is

 75.
 100.
 50.
 1/75.

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Electromagnetic Field Theory
Two coupled coils with L1 = L2 = 0.6 H have a coupling coefficient of K = 0.8. The turns ratio N1/N2 is

 0.5.
 4.
 1.
 2.

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Electromagnetic Field Theory
In an iron core coil the iron core is removed so that the coil becomes an air core coil. The inductance of the coil will

 initially increase and then decrease.
 remain the same.
 decrease.
 increase.

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MORE MCQ ON Electromagnetic Field Theory

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