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Electromagnetic Field Theory

Electromagnetic Field Theory
How much current must flow in a loop of radius 1m to produce a magnetic field of 1 mA/m?

 2.5 mA.
 2 mA.
 1.5 mA.
 1mA.

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Electromagnetic Field Theory
A satellite that simply reflect back the signals from one region of the earth to the other region is known as

Geostationary satellite
Passive satellite
Orbiting satellite
Active satellite

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Electromagnetic Field Theory
Whenever the magnetic flux changes with respect to an electric conductor or a coil, an EMF is induced in the conductor is Faraday’s

 second law
 third law
 fourth law
 first law

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Electromagnetic Field Theory
Which of the following represents ohms law

 V = RI
 J = σE
All of these
 I = GV

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

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Electromagnetic Field Theory
Conductor is static and the 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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