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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
A vector field A = p In is given in Cartesian coordinates. In cylindrical coordinates it will be represented as

 A = cosφ Ir + sinφ Iφ.
 A = cosφ Ir - sinφ Ir.
 A = cosφ Ir.
 A = sinφ Ir.

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Electromagnetic Field Theory
As a result of reflection from a plane conducting wall, electromagnetic waves acquire an apparent velocity greater than the velocity of light in space. This is called the

 group velocity.
 phase velocity.
 velocity of propagation.
 normal velocity.

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Electromagnetic Field Theory
Parabolic and lens antenna used at

High frequency
Low frequency
Microwave frequency
Medium frequency

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Electromagnetic Field Theory
Two point charges (Q and – Q) are situated at the vertex of the square. If potential at another vertex is 2 V, so potential at opposite vertex (diagonally) is

 1 V.
  2 V.
 Zero.
 √ 2 V.

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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

 40 V.
 8 V.
 80 V.
 60 V.

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MORE MCQ ON Electromagnetic Field Theory

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