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Electromagnetic Field Theory

Electromagnetic Field Theory
The power gain of a half-wave dipole with respect to an isotropic radiator is

3 db
6 db
2.15 db
4.15 db

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Electromagnetic Field Theory
Tropospheric scatter is used with frequencies in the

HF
VHF
VLF
UHF

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Electromagnetic Field Theory
The energy stored in the magnetic field at a solenoid 30 cm long and 3 cm diameter wound with 1000 turns of wire carrying an current at 10 A, is

 1.15 J.
 0.5 J.
 0.015 J.
 0.15 J.

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Electromagnetic Field Theory
The drawback of Daltons atomic structure is that, it says

 none of these.
 unique nature of atom.
 most of the volume of an atom is empty space.
 the atoms can neither be created nor be destroyed.

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Electromagnetic Field Theory
Electric flux in coulombs emanating from any surface of a cube containing C coulombs of charge at its centre is

 Q / 6.
 4πQ / 6ε.
 Q / 4π.
 Q / 6ε.

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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

Active satellite
Geostationary satellite
Orbiting satellite
Passive satellite

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MORE MCQ ON Electromagnetic Field Theory

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