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Electromagnetic Field Theory

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

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

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Electromagnetic Field Theory
Which is the major factor for determining whether a medium is free space, lossless dielectric or a good conductor

  Loss tangent.
 Constitutive parameters.
 Attenuation constant.
 Reflector coefficient.

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Electromagnetic Field Theory
1 Maxwell is the same as

 104 weber.
 10-8 weber.
 10-4 weber.
 10-8 weber.

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Electromagnetic Field Theory
A satellite that simply reflect back the signals from one region of the earth to the other region is known as

Active satellite
Orbiting satellite
Passive satellite
Geostationary satellite

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Electromagnetic Field Theory
A negative point charge q = - 40 nC is moving with velocity of 6 × 106 m/s in a direction specited by unit vector uy + 0.6 uz. Find the magnitude of force vector on the moving particle by the field B = 2 ux + 3 uy + 5 uz mT and E = 2 ux - 3 uy + 5 uz KV/m

 144 μN.
 244 μN.
 1440 μN.
  1144 μN.

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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.
 40 V.
 8 V.
 80 V.

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