Refer to CUET Political Science MCQs Unit X Communication Systems provided below available for download in Pdf. The MCQ Questions for UG Physics with answers are aligned as per the latest syllabus and exam pattern suggested by CUET, NCERT and KVS. Multiple Choice Questions for Unit X Communication Systems are an important part of exams for UG Physics and if practiced properly can help you to improve your understanding and get higher marks. Refer to more Chapter-wise MCQs for CUET UG Physics and also download more latest study material for all subjects
MCQ for UG Physics Unit X Communication Systems
UG Physics students should refer to the following multiple-choice questions with answers for Unit X Communication Systems in UG.
Unit X Communication Systems MCQ Questions UG Physics with Answers
Question : During ground wave propagation the transmitted waves gets attenuated because
(a) earth surface absorbs the waves
(b) frequency of the waves are too low
(c) energy content of these waves are high
(d) earth surface offers resistance.
Answer: D
Question : 12 signals each band limited to 5 kHz are to be transmitted by frequency-division multiplexer. If AM-SSB modulation guard band of 1 kHz is used then the bandwidth of multiplexed signal is
(a) 101 kHz
(b) 99 kHz
(c) 84 kHz
(d) 71 kHz
Answer: D
Question : Communication is the process of
(a) keeping in touch
(b) exchange information
(c) broad casting
(d) entertainment by electronics
Answer: B
Question : The term channel is used to indicate
(a) the amplitude range allocated to a given source
(b) the frequency range allocated to a given source
(c) the voltage-range allocated to a given source
(d) All of the above
Answer: B
Question : Wave obtained on superimposition of audible frequency e.m. wave is known as
(a) carrier wave
(b) high frequency wave
(c) modulating wave
(d) modulated wave
Answer: D
Question : For a radio wave reaching the ionised medium
(a) will bend away from normal
(b) will bend towards normal
(c) will bend follow a straight-path
(d) None of these.
Answer: A
Question : An audio frequency of 10 kHz is transmitted by SSB after AM with carrier waves of frequency 1MHz. The frequency of current in output load is
(a) 1010 kHz or 990 kHz
(b) 1010 MHz or1010 MHz
(c) 110 kHz or 990 kHz
(d) 110 MHz or 990 MHz
Answer: A
Question : Television signals are
(a) frequency modulated
(b) amplitude modulated
(c) both frequency and amplitude modulated
(d) phase modulated
Answer: C
Question : A transducer used at the transmitting end, serves the purpose of converting
(a) electrical signal to sound form
(b) sound signal to electrical form
(c) electrical signal to magnetic form
(d) sound signal to magnetic form
Answer: B
Question : The AM wave is equivalent to the summation of
(a) two sinusoidal waves
(b) three sinusoidal waves
(c) four sinusoidal waves
(d) None of these
Answer: B
Question : The service area of space wave communication increases by
(a) increasing the height of transmitting antenna
(b) decreasing the height of receiving antenna
(c) increasing the height of both transmitting and receiving antenna
(d) decreasing the distance between transmitting and receiving antenna
Answer: C
Question : In FM, when frequency deviation is doubled, then
(a) modulation is halved
(b) carrier swing is halved
(c) modulation is doubled
(d) modulation index is decreased
Answer: C
Question : Which of the following is the element of a communication system?
(a) Transmitter
(b) channel
(c) Receiver
(d) All of the above
Answer: D
Question : Which of the following is drawback of amplitude modulation?
(a) low efficiency
(b) noise reception
(c) operating range is small
(d) all of these
Answer: D
Question : In an amplitude modulated wave for audio frequency of 500 cycle/second, the appropriate carrier frquency will be
(a) 50 cycles/s
(b) 100 cycles/s
(c) 500 cycles/s
(d) 50, 000 cycles/s
Answer: D
Question : Buffer amplifier is used at the transmitting end to
(a) feed carrier frequency to master oscillator
(b) amplify carrier frequency
(c) mix modulating signal with carrier frequency
(d) isolate master oscillator from other stages of transmitter.
Answer: D
Question : Audio signal cannot be transmitted because
(a) the signal has more noise
(b) the signal cannot be amplified for distance communication
(c) the transmitting antenna length is very small to design
(d) the transmitting antenna length is very large and impracticable
Answer: D
Question : In PCM if the transmission path is very long
(a) pulse spacing is reduced
(b) pulse amplitude is increased
(c) pulse width is increased
(d) repeater stations are used.
Answer: D
Question : As the height of satellite orbit gets lower, the speed of the satellite
(a) increases
(b) decreases
(c) remain same
(d) both (a) and (b)
Answer: B
Question : To cover a population of 20 lakh, a transmission tower should have a height: (radius of the earth = 6400 km, population per square km = 1000)
(a) 25 m
(b) 50 m
(c) 75 m
(d) 100 m
Answer: B
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MCQs for Physics CUET UG Unit X Communication Systems
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Unit X Communication Systems MCQs Physics CUET UG
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Unit X Communication Systems CUET UG MCQs Physics
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CUET MCQs Physics UG Unit X Communication Systems
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