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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

4.15 db
2.15 db
6 db
3 db

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Electromagnetic Field Theory
XEROX machine is working on

 heating effect of current.
 magnetic effect.
 peltier effect.
 electrostatic effect.

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Electromagnetic Field Theory
Poyniting vector has the dimensions

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

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Electromagnetic Field Theory
For DC voltage an inductor is virtually a

 short circuit.
 depends on polarity.
 depends on magnitude of voltage.
 open circuit.

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Electromagnetic Field Theory
The inductance of a long solenoid of length 1000 mm wound uniformly with 3000 turns on a cylindrical paper cable of 60 mm diameter is

 3.2 mH.
 3.2 H.
 32 mH.
 3.2 µH.

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Electromagnetic Field Theory
Which of the following is zero in relation to electromagnetic fields?

 Curl curl A.
 Div grad V.
 Div curl A.
 Grad div A.

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MORE MCQ ON Electromagnetic Field Theory

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