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Electromagnetic Field Theory

Electromagnetic Field Theory
Two straight parallel conductors carry equal currents in opposite direction. The force between them is

 none of above.
 repulsive.
 zero.
 attractive.

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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

 4.
 1.
 0.5.
 2.

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Electromagnetic Field Theory
A charge which when placed in vacuum from an equal and similar charge repels with a force of 9 × 103 N, is known as

 milli - coulomb.
 micro - coulomb.
 coulomb.
 pico - coulomb.

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Electromagnetic Field Theory
When a current carrying conductor is brought into magnetic field, the force that moves the conductor depends upon

The direction of the conductor
None of these
The weight of the conductor
The value of current

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Electromagnetic Field Theory
The hysteresis loop of a magnetic material has an area of 5 cm2 with the scale given as 1 cm = 2 AT and 1 cm = 50 mwb At 50 Hz; the total hysteresis loss is

 20 W.
  25 W.
 50 W.
 15 W.

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Electromagnetic Field Theory
A potential field is given by V = 3x2 y – yz. The electric field at P(2, -1, 4) is

 12 Ix - 8 Iy V/m.
 12 Ix - 8 Iy - Iz V/m.
 12 Ix + 8 Iy + Iz V/m.
 12 Ix - Iz V/m.

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MORE MCQ ON Electromagnetic Field Theory

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