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Electromagnetic Field Theory

Electromagnetic Field Theory
Self inductance of magnetic coil is proportional to

 1 / N2.
 N.
 1 / N.
 N2.

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Electromagnetic Field Theory
The energy stored in the magnetic field in a solenoid 30 cm long and 3 cm diameter wound with 1000 turns of wire carrying a current at 10 amp, is

 0.15 joule.
 0.015 joule.
 1.15 joule.
 0.015 joule.

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

Unity
None of these
Constant
Both A and B

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Electromagnetic Field Theory
Fleming's right hand rule may be applied to an electric generator to find out the direction of

 rotor rotation.
 induced emf.
 magnetic field.
None of these

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Electromagnetic Field Theory
The attenuation in waveguide above to cut off frequency

Very high
Zero
Very low
Infinite

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Electromagnetic Field Theory
In above question no. 9, the average force on the core to reduce the air gap will be

 832.29 N.
 3332.47 N.
 1666.22 N.
 6664.8 N.

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MORE MCQ ON Electromagnetic Field Theory

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