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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

 repulsive.
 none of above.
 attractive.
 zero.

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

2.15 db
6 db
3 db
4.15 db

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Electromagnetic Field Theory
Plane z = 10 m carries charge 20 C/m2. The electric field intensity at the origin is

  – 360 πuz v/m.
 – 72 πuz v/m.
 – 10 uz v/m.
 – 18 πuz v/m.

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Electromagnetic Field Theory
A pure inductor when connected across 220 V, 50 Hz supply consumes 100 W. From the above statement it can be concluded that

 the inductor has ferrite core.
 the inductor is made of thin wire.
 the inductor is non linear.
 the above statement is false.

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Electromagnetic Field Theory
Unit of electric flux density is

 farad / meter.
 weber / meter2.
 coulomb / meter2.
 coulomb.

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Electromagnetic Field Theory
In above problem, if the inductance L1 and L2 in series aiding with 30 mH mutual inductance, then total inductance will be

 150 mH.
 200 mH.
 100 mH.
 50 mH.

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