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Electromagnetic Field Theory

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

 electrons.
 protons.
 electric field.
 neutrons.

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Electromagnetic Field Theory
The magnitude of force acting on a current carrying conductor placed in a magnetic field is independent of

 current flowing through the conductor.
 cross-sectional area of conductor.
 flux density.
 length of conductor.

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

Log-periodic
Folded dipole
Conical horn
Square loop

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Electromagnetic Field Theory
The skip distance is the maximum distance upto which ionospheric reflection is possible.

True
False

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Electromagnetic Field Theory
Ohm’s law in point from field theory can be expressed as

 J = E / σ.
 J = σE.
 V = IR.
 R = ρ × ( l / A).

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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

 32 mH.
 3.2 H.
 3.2 µH.
 3.2 mH.

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