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Electromagnetic Field Theory

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

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

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Electromagnetic Field Theory
A Yagi antenna has a driven antenna

Only
With one or more directors
With a reflector
With a reflector and one or more directors

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Electromagnetic Field Theory
Cork Screw rule is used to find

 direction of current.
 direction of magnetic field.
 direction of electric field.
 direction of emf.

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

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

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

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Electromagnetic Field Theory
Fleming's right hand rule may be applied to an electric generator to find out the direction of

None of these
 magnetic field.
 induced emf.
 rotor rotation.

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MORE MCQ ON Electromagnetic Field Theory

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