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Electromagnetic Field Theory

Electromagnetic Field Theory
If E is the electric field intensity, then what is the value of divergence of (curl of E)?

 | E |.
 Null vector.
 Zero.
 E.

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Electromagnetic Field Theory
Two straight parallel conductors carry equal currents in opposite direction. The force between them is

 attractive.
 zero.
 repulsive.
 none of above.

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Electromagnetic Field Theory
Electric flux in coulombs emanating from any surface of a cube containing C coulombs of charge at its centre is

 Q / 6.
 Q / 6ε.
 Q / 4π.
 4πQ / 6ε.

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Electromagnetic Field Theory
In a lossless medium the intrinsic impedance η = 60π and μr = 1. The relative dielectric constant εr shall be

 4.
 1.
 8.
 2.

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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

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

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Electromagnetic Field Theory
The main purpose of choke is

 none of above.
 to block low frequencies.
 to pass high frequencies.
  to pass low frequencies.

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MORE MCQ ON Electromagnetic Field Theory

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