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Electromagnetic Field Theory

Electromagnetic Field Theory
How much current must flow in a loop of radius 1m to produce a magnetic field of 1 mA/m?

 1.5 mA.
 2.5 mA.
 1mA.
 2 mA.

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Electromagnetic Field Theory
Poyniting vector has the dimensions

 Watt × metre2.
 Watt/metre.
 Watts/metre2.
 Watt × metre.

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Electromagnetic Field Theory
Two coils have inductances L1 = 1200 mH and L2 = 800 mH. They are connected in such a way that flux in the two coils aid each other and inductance is measured to be 2500 mH, then Mutual inductance between the coils is ___________ mH.

 145.
 250.
 225.
 150.

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

Directional Coupler
Balun
Slotted line
Tee

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Electromagnetic Field Theory
Electric field strength of charge

 Increase distance.
 Increase square distance.
 Decrease with square distance.
 Decrease with distance.

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Electromagnetic Field Theory
Two coils are coupled in such a way that the mutual inductance between them is 20 mH. If the inductances of the coils are 40 mH and 50 mH respectively, the coefficient of coupling is

 0.447.
 0.01.
 0.577.
 0.477.

ANSWER DOWNLOAD EXAMIANS APP
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