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Electromagnetic Field Theory

Electromagnetic Field Theory
Two parallel plates are separated by a distance D charged by V volt. The field intensity E is given by,

 V × D²
 V² / D
 V × D
 V / D

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Electromagnetic Field Theory
If the static magnetic flux density is B, then

 Curl of B = J.
 Divergence of B = J.
 Curl of B = 0.
  Divergence of B = 0.

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Electromagnetic Field Theory
Self inductance of magnetic coil is proportional to

 1 / N.
 1 / N2.
 N2.
 N.

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Electromagnetic Field Theory
For a line characteristic impedance zo terminated is load zo/3, the reflection coefficient is

 2/3.
  – ½.
 – 1/3.
 1/3.

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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.
 18.08 A.
 2.28 A.
 4.56 A.

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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

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

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MORE MCQ ON Electromagnetic Field Theory

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