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Electromagnetic Field Theory

Electromagnetic Field Theory
If a and b are the dimensions of waveguide then

a = b
a = b/4
a = 3b
a = 2b

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Electromagnetic Field Theory
The work done by a force F = 4un - 3uy + 2uz N in giving a 1nC charge a displacement of (10 ux + 2uy - 7uz) m is

 100 nj.
 20 nj.
 40 nj.
 60 nj.

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

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Electromagnetic Field Theory
Which of following is the unit of inductance?

  Ampere turns.
  Webers / m.
  Milli- henry.
 Ohm.

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Electromagnetic Field Theory
A point pole has a strength of 4π × 10-4 weber. The force in newtons on a point pole of 4π × 1.5 × 10-4 weber placed at a distance of 10 cm from it will be

 3.75 N.
 7.5 N.
 15 N.
 20 N.

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Electromagnetic Field Theory
A pure inductor is connected across a voltage source. Find the active power drawn by the inductor?

 0
None of these
 either 1 or 2
 maximum

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