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Electromagnetic Field Theory

Electromagnetic Field Theory
The main purpose of choke is

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

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Electromagnetic Field Theory
It is best to use for coupling a coaxial line to a parallel wire transmission line.

Tee
Slotted line
Balun
Directional Coupler

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Electromagnetic Field Theory
An inductor designed with 400 turns coil wound on an iron core of 16 cm2 cross sectional area and with a cut of air gap length of 1 mm. The coil is connected to a 230 V, 50 Hz supply. Neglected coil resistance, core loss, iron reluctance and leakage inductance. Find the current in the inductor.

 18.08 A.
 2.28 A.
 9.04 A.
 4.56 A.

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Electromagnetic Field Theory
The force on a charge moving with velocity v under the influence of electric and magnetic fields is given by which one of the following

 q(E +V × H).
 q(H + V × E).
 q(E + B × V).
 q(E + V × B).

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

Conical horn
Log-periodic
Folded dipole
Square loop

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Electromagnetic Field Theory
An infinite non conducting sheet of charge has σ of 10-7 c/m3. Equipotential surface for a potential of 10 volts is.

 0.
 0.88 mm.
 1.32 mm.
  1.77 mm.

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