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Electromagnetic Field Theory

Electromagnetic Field Theory
In a lossless medium the intrinsic impedance η = 60π and μr = 1. The relative dielectric constant εr shall be

 8.
 4.
 1.
 2.

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Electromagnetic Field Theory
The electric flux is given D = (2y2 + z) Ix + 4xy Iy + x Iz C/m2. The volume charge density at point (-1, 0, 3) is

 - 4 C/m3.
 - 8 C/m3.
 - 2 C/m3.
 0 C/m3.

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Electromagnetic Field Theory
The principle of dynamically induced emf is utilized in a

 generator.
 thermocouple.
 choke.
 transformer.

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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.

 0.6m.
 0.5m.
 6.25m.
 5.25m.

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

 Maxwell.
 Telsa.
 All of above.
 Weber.

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Electromagnetic Field Theory
A magnetic field B = 5 × 10-2 uz T exerts a force on 0.02 m conductor along the x-axis. The conductor carried a current of 5 mA in the – ux direction. What force must be applied to the conductor to hold it in position

 5 × 10-5 uy N.
  - 5 × 10-5 uy N.
 5 × 10-5 uz N.
 5 × 10-5 ux N.

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