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Electromagnetic Field Theory

Electromagnetic Field Theory
Which of the following is multiband HF receiving antenna?

Folded dipole
Square loop
Conical horn
Log-periodic

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Electromagnetic Field Theory
It is best to use for coupling a coaxial line to a parallel wire transmission line.

Balun
Slotted line
Tee
Directional Coupler

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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 uy N.
 5 × 10-5 uz N.

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Electromagnetic Field Theory
An electric field of 1.92 × 103 N/C is maintained across two plates separated by 0.015 m. Potential difference across plates will be

 2.88 V.
 28.8 V.
 14.40 V.
 1.4 V.

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

 thermocouple.
 transformer.
 choke.
 generator.

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Electromagnetic Field Theory
The magnetic vector potential due to a single conductor carrying current is

 zero.
 infinite.
 none of tha above.
 finite.

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MORE MCQ ON Electromagnetic Field Theory

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