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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
3 db
6 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

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

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Electromagnetic Field Theory
A medium is said to be isotropic when

 ∈ is a scalar constant.
 ∈ is zero.
 ∈ = μ.
 ∈ = μσ.

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Electromagnetic Field Theory
The force experienced by a current carrying conductor lying parallel to a magnetic field is

 BIL.
 zero.
 Bil sinθ.
 Bil cosθ.

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Electromagnetic Field Theory
The hysteresis loop of a magnetic material has an area of 5 cm2 with the scale given as 1 cm = 2 AT and 1 cm = 50 mwb At 50 Hz; the total hysteresis loss is

 50 W.
 15 W.
  25 W.
 20 W.

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Electromagnetic Field Theory
The magnetic intensity in A/m at the centre of circular coil of diameter 1m and carrying a current of 2A is

 3.
 2.
 4.
 8.

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MORE MCQ ON Electromagnetic Field Theory

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