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Electromagnetic Field Theory

Electromagnetic Field Theory
Two straight parallel conductors carry equal currents in opposite direction. The force between them is

 zero.
 attractive.
 repulsive.
 none of above.

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Electromagnetic Field Theory
For DC voltage an inductor is virtually a

 short circuit.
 depends on polarity.
 depends on magnitude of voltage.
 open circuit.

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Electromagnetic Field Theory
A Yagi antenna has a driven antenna

With a reflector and one or more directors
Only
With one or more directors
With a reflector

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Electromagnetic Field Theory
An insulated metal sphere of 20 cm diameter is charged by rubbing with charges 2 × 10-8 C. Potential developed will be

 0 V.
 900 V.
 200 V.
 1800 V.

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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
An infinite non conducting sheet of charge has σ of 10-7 c/m3. Equipotential surface for a potential of 10 volts is.

  1.77 mm.
 0.88 mm.
 1.32 mm.
 0.

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MORE MCQ ON Electromagnetic Field Theory

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