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Electromagnetic Field Theory

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

 Inductor.
 Variable Resistor.
 Capacitor.
 Condenser.

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

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Electromagnetic Field Theory
Two coupled coils with L1 = L2 = 0.6 H have a coupling coefficient of K = 0.8. The turns ratio N1/N2 is

 4.
 2.
 1.
 0.5.

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

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

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Electromagnetic Field Theory
A point charge in space is attracted towards a dielectric material because of the

 dielectric hysteresis.
 all of above.
 maximisation of electrostatic flux.
 phenomenon of dielectric polarisation.

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Electromagnetic Field Theory
The tubes of force within the magnetic material are known as

 none of them.
 magnetic flux.
 lines of force.
 tubes of indication.

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