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Electromagnetic Field Theory

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

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

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Electromagnetic Field Theory
The force on a charge moving with velocity v under the influence of electric and magnetic fields is given by which one of the following

 q(E + B × V).
 q(H + V × E).
 q(E + V × B).
 q(E +V × H).

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Electromagnetic Field Theory
When a wave is incident from the more dense into a less dense medium at an angle equal to or exceeding the critical angle, the wave suffers total internal __________ .

None of these
Reflection
Transmission
Refraction

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Electromagnetic Field Theory
Two coupled coils with L1 = L2 = 0.6 H have a coupling coefficient of K = 0.8. The turns ratio N1/N2 is

 1.
 0.5.
 2.
 4.

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Electromagnetic Field Theory
The main purpose of choke is

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

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Electromagnetic Field Theory
In case of all flux from the current in coil 1 links with coil 2, the coefficient of coupling will be

 0.5.
 2.0.
 Zero.
 1.0.

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