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Electromagnetic Field Theory

Electromagnetic Field Theory
In an inductor current cannot change abruptly. Comment on the statement.

 False.
 Cannot comment.
 True partially.
 True.

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Electromagnetic Field Theory
An emf of 16 volts is induced in a coil of inductance 4 H. The rate of change of current must be

 16 A / s.
 4 A / s.
 32 A / s.
 64 A / s.

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Electromagnetic Field Theory
Tropospheric scatter is used with frequencies in the

UHF
VLF
VHF
HF

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Electromagnetic Field Theory
Find the length of a conductor which is moving with a velocity 0.4m/s in a magnetic field of 8T, inducing an emf of 20V.

 0.6m.
 6.25m.
 0.5m.
 5.25m.

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Electromagnetic Field Theory
The main purpose of choke is

 to pass high frequencies.
 to block low frequencies.
 none of above.
  to pass low frequencies.

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Electromagnetic Field Theory
The ability of charged bodies to exert force on one another is attributed to the existence of

 electrons.
 neutrons.
 electric field.
 protons.

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