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Electromagnetic Field Theory

Electromagnetic Field Theory
Two straight parallel conductors carry equal currents in opposite direction. The force between them is

 attractive.
 none of above.
 zero.
 repulsive.

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Electromagnetic Field Theory
Poyniting vector has the dimensions

 Watt/metre.
 Watt × metre.
 Watt × metre2.
 Watts/metre2.

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Electromagnetic Field Theory
A solid sphere made of insulating material has a radius R and has a total charge Q distributed uniformly in its volume. What is the magnitude of electric field intensity, E, at a distance r (o less than r less than R) inside the sphere

 QR/(4π εo r3).
 Q/(4 π εo r3).
 Qr/(4 π εo R3).
 3 Qr/(4 π εo R3).

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Electromagnetic Field Theory
The right hand rule for determining the direction of the induced EMF was introduced by

 Lenz
 Faraday
 Fleming
 Maxwell

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

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Electromagnetic Field Theory
A square corner reflector is used in which of the following?

Radio astronomy
All of these
Point-to-point communication
TV broadcast

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