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Electromagnetic Field Theory

Electromagnetic Field Theory
The inductance of a long solenoid of length 1000 mm wound uniformly with 3000 turns on a cylindrical paper cable of 60 mm diameter is

 32 mH.
 3.2 H.
 3.2 mH.
 3.2 µH.

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Electromagnetic Field Theory
A sphere of radius with a uniform charge density ρv C/m3 shall have electric flux density at radius “r = a” equal to

 ρv/3 C/m2.
 aρv C/m2.
 aρv/3 C/m2.
 aρv/4 C/m2.

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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

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

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Electromagnetic Field Theory
Biot-Savarts law states the relation between magnetic intensity and

 (A), (B), and (D) are all correct.
 surface current only.
 filament current only.
 volume current only.

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Electromagnetic Field Theory
The force experienced by a current carrying conductor lying parallel to a magnetic field is

 BIL.
 zero.
 Bil cosθ.
 Bil sinθ.

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Electromagnetic Field Theory
The frequency of the power wave associated with an electromagnetic wave having field as E = e-z/δ cos(ω - zδ) is given by

 ω / π.
 ω/4π.
 ω.
 ω/2π.

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