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Electromagnetic Field Theory

Electromagnetic Field Theory
Ohm’s law in point from field theory can be expressed as

 R = ρ × ( l / A).
 V = IR.
 J = E / σ.
 J = σE.

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Electromagnetic Field Theory
For a linear electromagnetic circuit, which of the following statement is true?

 Co-energy is zero.
 Field energy is equal to the co-energy.
 Field energy is greater than the co-energy.
 Field energy is lesser than the co-energy.

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Electromagnetic Field Theory
MUF is depend upon

Received frequency by receiver
Electron density of the ionospheric layer
11 year sun spot cycle
Height of ionospheric layer

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Electromagnetic Field Theory
If the static magnetic flux density is B, then

 Curl of B = J.
 Curl of B = 0.
  Divergence of B = 0.
 Divergence of B = J.

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Electromagnetic Field Theory
The magnetic field required to reduce the residual magnetism to zero is called

 Retentivity.
 Saturation magnetism.
 Coercivity.
 Hysteresis.

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Electromagnetic Field Theory
A conductor of length 100 cm moves at right angles to a magnetic field of flux density 1.5 Wb/m2 with a velocity of 50 m/s. The induced emf in the conductor will be

 37.5 V.
 150 V.
 50 V.
 75 V.

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MORE MCQ ON Electromagnetic Field Theory

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