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Electromagnetic Field Theory

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

Zero
Very low
Infinite
Very high

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Electromagnetic Field Theory
Voltage applied across a dielectric produces an electrostatic field 50 times greater than air. The dielectric constant of the dielectric will be

 20.
 5.
 10.
 50.

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

 1.15 J.
 0.5 J.
 0.015 J.
 0.15 J.

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Electromagnetic Field Theory
Find H for centre of solenoid having finite length d = 1 unit where N = no of turns = 500, I = 2 A.

 1000.
 100.
 500.
 None of these.

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Electromagnetic Field Theory
A conductor of length 100 cm moves at right angles to a magnetic field of flux density 1.5 Wb/m2 with a velocity of 50 m/s. The induced emf in the conductor will be

 75 V.
 50 V.
 150 V.
 37.5 V.

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Electromagnetic Field Theory
The energy stored in the magnetic field in a solenoid 10 cm long and 4 cm diameter wound with 2000 turns of wire carrying a current at 20 amp, is

 24 joules.
 12 joules.
 15 joules.
 30 joules.

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MORE MCQ ON Electromagnetic Field Theory

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