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Electromagnetic Field Theory

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

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

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Electromagnetic Field Theory
The radiation pattern of loop antenna is

Elliptical
Cardoid or Limacon
Semicircle
Circle

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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

2.5
1.5
3.5
4.5

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Electromagnetic Field Theory
In frec 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.
 (103/377) cos(ωt - β z)(-ux) A/m.
 None of above.
 (103/377) sin(ωt - β z)(-uy) A/m.

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Electromagnetic Field Theory
A circular loop has its radius increasing at a rate of 2 m/s. The loop placed perpendicular to a constant magnetic field of 0.5 wb/m2. When the radius of the loop is 4 m. the emf induced in the will be

 0.8 π V.
 Zero.
 0.4 π V.
 8 π V.

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Electromagnetic Field Theory
If in a 1 mF capacitor, an instantaneous displacement current of 1 A is to be established in the spaces between its plates then it is possible by applying

 106 Amp.
 106 volts.
 106 volts/sec.
 106 Amp/sec.

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