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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 µH.
 3.2 H.
 3.2 mH.
 32 mH.

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Electromagnetic Field Theory
It is best to use for coupling a coaxial line to a parallel wire transmission line.

Balun
Tee
Directional Coupler
Slotted line

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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 current of 3 A will be

 37.68 µH.
 113.04 µH.
 113.04 mH.
 37.68 mH.

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Electromagnetic Field Theory
Which of following circuit element stores energy in electro-magnetic field?

 Inductor.
 Condenser.
 Capacitor.
 Variable Resistor.

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Electromagnetic Field Theory
Conductor is constant and field is varying then emf will be induced. This principle is called

None of these
 virtually induced emf.
 dynamically induced emf.
 static induced emf.

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Electromagnetic Field Theory
Magnetic circuit with cross sectional area of 20 cm2 is to be operated at 50 Hz from 120 Vrms supply. The number of turns required to active a peak magnetic flux density of 1.8 T in the core flux is

 450.
 150.
 300.
 600.

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MORE MCQ ON Electromagnetic Field Theory

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