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Electromagnetic Field Theory

Electromagnetic Field Theory
The frequency range for satellite communication is

3000 to 30000 MHz
300 to 3000 kHz
30000 to 300000 MHz
3 to 30 kHz

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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

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

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Electromagnetic Field Theory
When a current carrying conductor is brought into magnetic field, the force that moves the conductor depends upon

None of these
The value of current
The weight of the conductor
The direction of the conductor

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Electromagnetic Field Theory
An inductor designed with 400 turns coil wound on an iron core of 16 cm2 cross sectional area and with a cut of air gap length of 1 mm. The coil is connected to a 230 V, 50 Hz supply. Neglected coil resistance, core loss, iron reluctance and leakage inductance. Find the current in the inductor.

 9.04 A.
 2.28 A.
 18.08 A.
 4.56 A.

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Electromagnetic Field Theory
Two coils are coupled in such a way that the mutual inductance between them is 20 mH. If the inductances of the coils are 40 mH and 50 mH respectively, the coefficient of coupling is

 0.01.
 0.447.
 0.477.
 0.577.

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Electromagnetic Field Theory
Which of the following represents ohms law

 J = σE
All of these
 V = RI
 I = GV

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