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Electromagnetic Field Theory

Electromagnetic Field Theory
A point pole has a strength of 4π × 10-4 weber. The force in newtons on a point pole of 4π × 1.5 × 10-4 weber placed at a distance of 10 cm from it will be

 7.5 N.
 20 N.
 15 N.
 3.75 N.

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Electromagnetic Field Theory
A magnetic vector potential is given by the expression A = (- cos x) (cos y) uz. The flux density at the origin is

 – 2 ux.
 – uy.
 2 ux.
  0.

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Electromagnetic Field Theory
It is best to use for coupling a coaxial line to a parallel wire transmission line.

Balun
Tee
Slotted line
Directional Coupler

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Electromagnetic Field Theory
In case of antenna the ratio of the power radiated in the desired direction to the power radiated in the opposite direction is known as

None of these
Front to back ratio
Loss coefficient
Transmission efficiency

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Electromagnetic Field Theory
A conductor of length L has current I passing through it, when it is placed parallel to strong magnetic field. The force experienced by the conductor will be

 BI2L.
 BL2I.
 zero.
 BIL.

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Electromagnetic Field Theory
The magnitude of force acting on a current carrying conductor placed in a magnetic field is independent of

 flux density.
 length of conductor.
 current flowing through the conductor.
 cross-sectional area of conductor.

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MORE MCQ ON Electromagnetic Field Theory

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