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Electromagnetic Field Theory

Electromagnetic Field Theory
The static electric field in a conductor is

Zero
None of these
Infinity
Unity

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Electromagnetic Field Theory
Which of following can induce the maximum induced voltage ?

 1 amp 1 Hz.
 1 amp 100 Hz.
 20 amp dc.
 1 amp dc.

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Electromagnetic Field Theory
The coils having self inductance of 10 mH and 15 mH have an effective inductance of 40 mH, when connected in series aiding. What will be the equivalent inductance if we connect then in series opposing?

 20 mH.
  10 mH.
 0 mH.
 5 mH.

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Electromagnetic Field Theory
The work done by a force F = 4un - 3uy + 2uz N in giving a 1nC charge a displacement of (10 ux + 2uy - 7uz) m is

 20 nj.
 60 nj.
 40 nj.
 100 nj.

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

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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.

 0.
 1.32 mm.
  1.77 mm.
 0.88 mm.

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