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Electromagnetic Field Theory

Electromagnetic Field Theory
Find the length of a conductor which is moving with a velocity 0.4m/s in a magnetic field of 8T, inducing an emf of 20V.

 6.25m.
 5.25m.
 0.6m.
 0.5m.

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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.
 150 mH.
 200 mH.
 50 mH.

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Electromagnetic Field Theory
The main disadvantage of the two-hole directional coupler is

Narrow bandwidth
Low directional coupling
High standing wave ratio
Poor directivity

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Electromagnetic Field Theory
________ at a point is defined as the force experienced per unit positive charge at a point placed in the electric field.

None of these
 Electric intensity.
 Electric flux.
 Magnetic flux density.

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Electromagnetic Field Theory
Which of following is not a unit of flux?

 All of above.
 Maxwell.
 Telsa.
 Weber.

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Electromagnetic Field Theory
A coil of 300 turns is wound on a non magnetic core having a mean circumference of 300 mm and a cross sectional area of 300 mm2. The inductance of the coil corresponding to a magnetizing current of 6 A will be

 37.68 μH.
  113.04 μH.
 1.1304 μH.
 3.768 μH.

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