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Electromagnetic Field Theory

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

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

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Electromagnetic Field Theory
A long straight wire carries a current I = 10A. At what distance is the magnetic field H = 1A/m?

 1.59 m.
 1.19 m.
 1.29 m.
 1.39 m.

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Electromagnetic Field Theory
1 Tesla =

 1 wb/m.
 1 wb- m2.
 1 wb .
 1 wb/ m2.

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Electromagnetic Field Theory
The tubes of force within the magnetic material are known as

 magnetic flux.
 none of them.
 lines of force.
 tubes of indication.

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Electromagnetic Field Theory
The property of the coil by which a counter emf is induced in it when the current through the coil changes is known as

 self inductance.
 series aiding inductance.
 mutual inductance.
 capacitance.

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Electromagnetic Field Theory
In above problem, if the inductance L1 and L2 in series aiding with 30 mH mutual inductance, then total inductance will be

 100 mH.
 200 mH.
 150 mH.
 50 mH.

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