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Electromagnetic Field Theory

Electromagnetic Field Theory
An open wire transmission line having a characteristic impedance of 600 ohms is terminated by a resistive load of 900 O. The standing wave ratio will be

3.5
1.5
4.5
2.5

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Electromagnetic Field Theory
Whenever the magnetic flux changes with respect to an electric conductor or a coil, an EMF is induced in the conductor is Faraday’s

 second law
 fourth law
 first law
 third law

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Electromagnetic Field Theory
In free space E (z, t) = 103 sin(ωt - βz) uy v/m. What is the value of H (z, t)

 (103/377) cos(ωt - β z)(-ux) A/m.
 (103/377) sin(ωt - β z)(ux) A/m.
 (103/377) sin(ωt - β z)(-ux) A/m.
 None of above.

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Electromagnetic Field Theory
Unit of electric flux density is

 farad / meter.
 weber / meter2.
 coulomb / meter2.
 coulomb.

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Electromagnetic Field Theory
Plane z = 10 m carries charge 20 C/m2. The electric field intensity at the origin is

 – 10 uz v/m.
 – 72 πuz v/m.
  – 360 πuz v/m.
 – 18 πuz v/m.

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Electromagnetic Field Theory
Which of the following will increase the antenna radiation efficiency?

Any of the above
Use of larger section of conductor
Providing insulation on conductor
Top loading of antenna

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