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Electromagnetic Field Theory

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

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

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Electromagnetic Field Theory
The potential that appears at a point in space due to the current which caused it is called potential

Oscillating
Lagging the current
Accelerating
Retardation

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Electromagnetic Field Theory
Plane z = 10 m carries charge 20 C/m2. The electric field intensity at the origin is

 – 18 πuz v/m.
 – 72 πuz v/m.
 – 10 uz v/m.
  – 360 πuz v/m.

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Electromagnetic Field Theory
Conductor is constant and field is varying then emf will be induced. This principle is called

 dynamically induced emf.
None of these
 static induced emf.
 virtually induced emf.

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Electromagnetic Field Theory
A conductor of length 1 metre moves at right angles to magnetic field of flux density 1 Wb/m2 with a velocity of 25 m/s. The induced emf in the conductor will be

 25 V.
 100 V.
 50 V.
 75 V.

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Electromagnetic Field Theory
In above problem the induced emf will be reduced to half if the conductor moves an angle of

  45° to the direction of field.
  75° to the direction of field.
  60° to the direction of field.
  30° to the direction of field.

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