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Free download in PDF Electromagnetic Waves Objective Type Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(21)
Which property of an electromagnetic wave, depends on the medium in which it is travelling?
[A]
Wave length
[B]
Time period
[C]
Frequency
[D]
Velocity
(22)
Find the value of D if the wave length of the wave is 40m, n=2 m and the angles are given as θ1 = 0˚, θ2 = 180˚.
[A]
20m
[B]
40m
[C]
10m
[D]
50m
(23)
Phase difference can be expressed in which of the following format?
[A]
Cycles
[B]
Seconds
[C]
Meters per second
[D]
None
(24)
Which of the following represents the correct sequence for the basis of EDM propagation?
[A]
Generation, propagation, reflection and reception
[B]
Generation, propagation, reception and reflection
[C]
Propagation, generation, reflection and reception
[D]
None of these
Answer: Generation, propagation, reflection and reception
(25)
Cps is the unit of what?
[A]
Frequency
[B]
Gain
[C]
Amplitude
[D]
Phase
(26)
The distance that the wave travels in one cycle is called as?
[A]
Wavelength
[B]
Cycle amplitude
[C]
Cycle length
[D]
None of these
(27)
The range of electromagnetic signals encompassing all frequencies is referred to as?
[A]
EM spectrum
[B]
EM radiation
[C]
EM waves
[D]
EM frequency
(28)
A signal travels a distance of 75 ft in the time it takes to complete 1 cycle. What is its frequency?
1 m 5 3.28 ft
[A]
13.12Mhz
[B]
14Mhz
[C]
13Mhz
[D]
None of these
(29)
The maximum peaks of an electromagnetic wave are separated by a distance of 8 in. What is the frequency?
[A]
1477.8Mhz
[B]
256.4Khz
[C]
1477.8Khz
[D]
256.7Mhz
(30)
Which one of the following is not a source of infrared radiation?
[A]
Books
[B]
Sun
[C]
Human bodies
[D]
None of these
31
What is the bandwidth of a signal having 928Mhz and 902Mhz as its upper and lower frequencies?
[A]
1830Mhz
[B]
1830Hz
[C]
26Hz
[D]
26Mhz
32
What is the upper frequency of a signal with a bandwidth of 6Mhz, if the lower frequency limit is 54Mhz?
[A]
60Hz
[B]
48Hz
[C]
60Mhz
[D]
None of above
33
Speed of electromagnetic waves is same
[A]
for all intensities
[B]
for all frequencies
[C]
for all wavelengths
[D]
in all media
Answer: for all intensities
34
Electromagnetic waves do not transport:
[A]
Charge
[B]
Energy
[C]
Momentum
[D]
Information
35
Electromagnetic waves are produced by:
[A]
charge in uniform motion
[B]
accelerated charged particle
[C]
deaccelerated charged particle
[D]
none of the above
Answer: accelerated charged particle
36
An electromagnetic radiation has an energy of 13.2 keV. Then, the radiation belongs to the region of
[A]
ultraviolet
[B]
X-ray
[C]
visible light
[D]
infrared
37
All electromagnetic waves travel through a vacuum at
[A]
the same speed
[B]
speeds that are proportional to their frequency
[C]
the same speed
[D]
None of the above
38
Electromagnetic waves are
[A]
Transverse
[B]
Both Longitudinal And Transverse
[C]
Longitudinal
[D]
None Of The Above
39
An electromagnetic wave is radiated by a straight wire antenna that is oriented vertically.
What should be the orientation of a straight wire receiving antenna? It should be placed
[A]
vertically
[B]
horizontally and in a direction perpendicular to the wave's direction of motion
[C]
horizontally and in a direction parallel to the wave's direction of motion
[D]
None of the above
40
Which organization regulates international EM spectrum division?
[A]
NTIA
[B]
FCC
[C]
ITU
[D]
None of these
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