Electromagnetic Field Theory - Part 1 Online Exam Quiz
Electromagnetic Field Theory - Part 1 GK Quiz. Question and Answers related to Electromagnetic Field Theory - Part 1. MCQ (Multiple Choice Questions with answers about Electromagnetic Field Theory - Part 1
Z L = 200 ? and it is desired that Z i = 50 ? The quarter wave transformer should have a characteristic impedance of
Options
A : 100 ?
B : 40 ?
C : 10000 ?
D : 4 ?
A broadside array consisting of 200 cm wavelength with 10 half-wave dipole spacing 10 cm. And if each array element feeding with 1 amp. current and operating at same frequency then find the half power beamwidth
Options
A : 4°
B : 2°
C : 10°
D : 15°
Refractive index of glass is 1.5. Find the wavelength of a beam of light with a frequency of 10 14 Hz in glass. Assume velocity of light is 3 x 10 8 m/sec in vacuum.
Options
A : 4 ?m
B : 3 ?m
C : 2 ?m
D : 1 ?m
The function f ( x - v ot ) represent which of the following?
Options
A : A stationary wave
B : A wave motion in forward direction
C : A wave motion in reverse direction
D : None of the above
A broadside array operating at 100 cm wavelength consist of 4 half-wave dipoles spaced 50 cm apart. Each element carries radio frequency current in the same phase and of magnitude 0.5 A. The radiated power will be
Options
A : 196 W
B : 73 W
C : 36.5 W
D : 18.25 W
The input impedance of short-circuited line of length l where ?/4 < l < ?/2, is
Options
A : resistive
B : inductive
C : capacitive
D : none of the above
A wave is propagated in a waveguide at frequency of 9 GHz and separation is 2 cm between walls find cut off wavelength for dominant mode.
Options
A : 4 cm
B : 1 cm
C : 2 cm
D : 8 cm
Find the radiation resistance of an antenna of length ?/10 meter?
Options
A : 8 ?
B : 780 ?
C : 7.8 ?
D : 78 ?
Charge needed within a unit sphere centred at the origin for producing a potential field,
Options
A : 12 p c
B : 60 p c
C : 120 p c
D : 180 p c
A rectangular metal waveguide filled with a dielectric of relative permittivity ? r = 4, has the inside dimensions 3 x 1.2 cm, the cut off frequency for the dominant mode is
Options
A : 2.5 GHz
B : 5 GHz
C : 10 GHz
D : 12.5 GHz
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