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Electromagnetic Field Theory

Electromagnetic Field Theory
The inductance of a long solenoid of length 1000 mm wound uniformly with 3000 turns on a cylindrical paper cable of 60 mm diameter is

 3.2 mH.
 32 mH.
 3.2 µH.
 3.2 H.

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Electromagnetic Field Theory
The useful magnetic flux obtainable from any closed surface is

None of these
Unity
Both A and B
Constant

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Electromagnetic Field Theory
A coil of 300 turns is wound on a non magnetic core having a mean circumference of 300 mm and a cross sectional area of 300 mm2. The inductance of the coil corresponding to a magnetizing current of 6 A will be

 37.68 μH.
 1.1304 μH.
  113.04 μH.
 3.768 μH.

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Electromagnetic Field Theory
Find the strength of the magnetic field when a 2m long conductor is moving with a velocity 4m/s inducing an emf of 20V.

 2.5T.
 10T.
 0.5T.
 5T.

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Electromagnetic Field Theory
XEROX machine is working on

 peltier effect.
 heating effect of current.
 electrostatic effect.
 magnetic effect.

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Electromagnetic Field Theory
A square corner reflector is used in

Point to point communication
All of these
Tv broadcast
Radio astronomy

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MORE MCQ ON Electromagnetic Field Theory

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