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Electromagnetic Field Theory

Electromagnetic Field Theory
The shape of B-H curve for air gap is

 ellipse.
 parabola.
 straight line.
 hyperbola.

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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
Which of following is not a unit of flux?

 Weber.
 All of above.
 Maxwell.
 Telsa.

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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.
 1.19 m.
 1.29 m.
 1.59 m.

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Electromagnetic Field Theory
When a current carrying conductor is brought into magnetic field, the force that moves the conductor depends upon

The weight of the conductor
The direction of the conductor
None of these
The value of current

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Electromagnetic Field Theory
A negative point charge q = - 40 nC is moving with velocity of 6 × 106 m/s in a direction specited by unit vector uy + 0.6 uz. Find the magnitude of force vector on the moving particle by the field B = 2 ux + 3 uy + 5 uz mT and E = 2 ux - 3 uy + 5 uz KV/m

 1440 μN.
 244 μN.
 144 μN.
  1144 μN.

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