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Electromagnetic Field Theory

Electromagnetic Field Theory
The radiation pattern of Hertzian dipole in the plane perpendicular to dipole is a

Figure of eight
None of these
Null
Circle

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

Balun
Directional Coupler
Slotted line
Tee

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Electromagnetic Field Theory
In above problem the induced emf will be reduced to half if the conductor moves an angle of

  30° to the direction of field.
  45° to the direction of field.
  75° to the direction of field.
  60° to the direction of field.

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Electromagnetic Field Theory
The force required to seperate two surfaces with a contact area measuring 5 cm by 6 cm, when flux density normal to the surface is 0.8 tesla, will be

 76400 N.
 764 N.
 76.4 N.
 7640 N.

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Electromagnetic Field Theory
The property of the coil by which a counter emf is induced in it when the current through the coil changes is known as

 capacitance.
 series aiding inductance.
 self inductance.
 mutual inductance.

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Electromagnetic Field Theory
A metal surface with 1 meter radius and surface charge density of 20 coulombs / m2 is enclosed in a 10 m side cube. The total outward electric displacement normal to the surface of the cube is

 10π coulombs.
 none of these.
 40π coulombs.
 80π coulombs.

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