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Electromagnetic Field Theory

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

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

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Electromagnetic Field Theory
The force required to seperate two surfaces with a contact area measuring 5 cm by 6 cm, when flux density normal to the surface is 0.8 tesla, will be

 76.4 N.
 764 N.
 7640 N.
 76400 N.

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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

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

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Electromagnetic Field Theory
Unit of electric flux density is

 weber / meter2.
 coulomb.
 farad / meter.
 coulomb / meter2.

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Electromagnetic Field Theory
Tropospheric scatter propagation is not subject to any fading.

True
False

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Electromagnetic Field Theory
A magnetic circuit requires 800 AT to produce a certain quantity of flux in a magnetic circuit. If its excitation coil has 100 turns and 5 Ohm resistance, the voltage to be applied in exciting coil is

 60 V.
 80 V.
 8 V.
 40 V.

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MORE MCQ ON Electromagnetic Field Theory

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