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Electromagnetic Field Theory

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

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

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

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

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Electromagnetic Field Theory
If E is the electric field intensity, then what is the value of divergence of (curl of E)?

 Zero.
 | E |.
 E.
 Null vector.

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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?

 1.39 m.
 1.29 m.
 1.19 m.
 1.59 m.

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Electromagnetic Field Theory
In a perfect conductor the incident and reflected wave combine to produce

None of these
A stronger incident wave
A standing wave which is not progressing
A stronger reflected wave

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Electromagnetic Field Theory
Mutual inductance between two magnetically coupled coils depends on

 cross sectional area of their common core.
 all of above.
 the number of their turns.
 permeability of core.

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