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Electromagnetic Field Theory

Electromagnetic Field Theory
The Biot-savarts law is a general modification of

 Amperes law.
 Kirchhoffs law.
 Lenzs law.
 Faradays law.

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Electromagnetic Field Theory
Materials subjected to rapid reversals of magnetism should have

 low permeability.
 high permeability.
 both a and b.
 low hysteresis loss.

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Electromagnetic Field Theory
A magnetic material has a total flux B of 80 micro Wb with an mmf of 160 AT. The reluctance in ampere turn per weber is

 2 × 108.
 2 × 106.
 2 × 10-8.
 2 × 10-6.

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Electromagnetic Field Theory
A loop antenna is a commonly used for

Radar
All of these
Direction finding
Satellite communication

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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

 200 V.
 900 V.
 1800 V.
 0 V.

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Electromagnetic Field Theory
Which of following is the unit of inductance?

  Ampere turns.
  Milli- henry.
  Webers / m.
 Ohm.

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MORE MCQ ON Electromagnetic Field Theory

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