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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

 zero.
 attractive.
 repulsive.
 none of above.

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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 ux N.
 5 × 10-5 uz N.

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Electromagnetic Field Theory
The transmitting antennas for lower frequencies (below 500 kHz) are generally

Parabolic reflector type
Any of the above
Horizontal suspended wire type
Vertical grounded wire type

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Electromagnetic Field Theory
In a perfect conductor the incident and reflected wave combine to produce

A stronger reflected wave
None of these
A stronger incident wave
A standing wave which is not progressing

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

 Lenz
 Maxwell
 Fleming
 Faraday

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Electromagnetic Field Theory
A vector field A = p In is given in Cartesian coordinates. In cylindrical coordinates it will be represented as

 A = cosφ Ir.
 A = cosφ Ir + sinφ Iφ.
 A = cosφ Ir - sinφ Ir.
 A = sinφ Ir.

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