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Electromagnetic Field Theory

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

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

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

 repulsive.
 none of above.
 attractive.
 zero.

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Electromagnetic Field Theory
A medium is said to be isotropic when

 ∈ is a scalar constant.
 ∈ = μσ.
 ∈ is zero.
 ∈ = μ.

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Electromagnetic Field Theory
The energy stored in the magnetic field in a solenoid 10 cm long and 4 cm diameter wound with 2000 turns of wire carrying a current at 20 amp, is

 12 joules.
 15 joules.
 30 joules.
 24 joules.

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Electromagnetic Field Theory
The divergence of a vector is a scalar, while the curl of a vector is another

Unit vector
None of these
Scalar
Vector

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

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

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