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Electromagnetic Field Theory

Electromagnetic Field Theory
A dipole having a moment p – 3ux - 5uy + 10uz ncm is located at p(1,2,-4) in free space. The V as Q(2,3,4) is

 1.26 V.
 2.62 V.
 1.31 V.
 2.52 V.

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Electromagnetic Field Theory
The Kirchhoff’s current law is implict in expression

 Divergence of B = 0.
 Curl of H = J + (δ D)/(δ t).
 Divergence of D = ρv.
  Surface integral of (j.ds) = 0.

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

Log-periodic
Conical horn
Square loop
Folded dipole

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

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

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

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

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Electromagnetic Field Theory
The force experienced by a current carrying conductor lying parallel to a magnetic field is

 Bil sinθ.
 BIL.
 Bil cosθ.
 zero.

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