Here we will provide you the 50+ MCQ Questions of Communication Systems for NEET-UG. Communication Systems is the chapter 15 in Class XII or Class 12 Physics NCERT Unit Communication Systems NEET (conducted by NTA) is based on the NCERT book.
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These 50+ MCQ questions are selected by the experts of studyrate.in and these are more difficult questions, which will help you to better understand Communication Systems NEET MCQ Questions with Answers.
Communication Systems NEET MCQ
The signal power of a transmitter is 10 kW and it is transmitting equally in all directions. What is the power per unit area of the EM waves at a distance of 100 km from the transmitter? (Assume that the waves are spherical.)
a. 1.3 pW/m²
b. 1.3 nW/m²
c. 1.3 µW/m²
d. 1.3 mW/m²
What is the main purpose of a repeater in a communication system?
a. To increase the signal strength
b. To amplify the signal
c. To regenerate the signal
d. To filter the signal
What is the function of a mixer in a communication system?
a. To amplify the signal
b. To mix two signals together
c. To filter out unwanted frequencies
d. To modulate the signal
Which of the following is an example of an analog modulation technique?
a. Frequency-shift keying (FSK)
b. Amplitude-shift keying (ASK)
c. Phase-shift keying (PSK)
d. Frequency modulation (FM)
Which of the following is an advantage of digital modulation over analog modulation?
a. Greater spectral efficiency
b. Simpler receiver design
c. Lower bit error rate
d. All of the above
In a communication system, a modulating signal of frequency 10 kHz is used to modulate a carrier wave of frequency 5 MHz. What is the bandwidth required for frequency modulation?
a) 15 kHz
b) 20 kHz
c) 25 kHz
d) 30 kHz
Which of the following is not a modulation technique?
a) Amplitude modulation
b) Frequency modulation
c) Phase modulation
d) Amplifier modulation
In a radio communication system, a transmitting antenna has a gain of 10 dB and a power output of 1 kW. The receiving antenna has a gain of 12 dB. What is the power received by the receiving antenna if it is located 10 km away from the transmitting antenna?
a) 6.3 × 10^-4 W
b) 2.5 × 10^-4 W
c) 4.6 × 10^-4 W
d) 8.9 × 10^-4 W
In an amplitude modulation system, the modulation index is 0.5. What is the maximum amplitude of the modulating signal if the carrier wave has an amplitude of 10 V?
a) 2 V
b) 4 V
c) 5 V
d) 6 V
In a frequency modulation system, the maximum deviation is 10 kHz and the modulating frequency is 2 kHz. What is the bandwidth required?
a) 14 kHz
b) 16 kHz
c) 20 kHz
d) 24 kHz
A signal of power 1 mW is transmitted through a channel with a noise power of 10^-3 W. What is the signal-to-noise ratio (SNR) in dB?
a) 30 dB
b) 40 dB
c) 50 dB
d) 60 dB
Which of the following is not a factor that affects the range of a radio communication system?
a) Frequency of the carrier wave
b) Power of the transmitter
c) Antenna height
d) Distance between the transmitter and receiver
In a communication system, the bit rate is 1000 bps and the signal-to-noise ratio (SNR) is 30 dB. What is the maximum achievable data rate if the channel capacity is 2000 Hz?
a) 500 bps
b) 1000 bps
c) 1500 bps
d) 2000 bps
In a phase modulation system, the modulating signal has a frequency of 5 kHz and the phase deviation is 30 degrees. What is the bandwidth required?
a) 5 kHz
b) 10 kHz
c) 15 kHz
d) 20 kHz
Which of the following is not a type of noise that can affect a communication system?
a) Thermal noise
b) Shot noise
c) Dark noise
d) Flicker noise
Which of the following is not a characteristic of a digital signal?
a) High noise immunity
b) Unlimited range
c) Easy storage and retrieval
d) High accuracy
Which of the following modulations is used for satellite communication?
a) Amplitude modulation
b) Frequency modulation
c) Phase modulation
d) All of the above
In a radio transmitter, the output power is:
a) Directly proportional to the modulation index
b) Directly proportional to the frequency deviation
c) Directly proportional to the amplitude of the modulating signal
d) None of the above
Which of the following is not an advantage of optical fibers over copper wires in communication systems?
a) High bandwidth
b) Immunity to electromagnetic interference
c) Longer distance transmission without repeaters
d) Lower cost
Which of the following is not a disadvantage of amplitude modulation?
a) Limited range
b) Low noise immunity
c) High power consumption
d) Low efficiency
Which of the following is the most commonly used type of modulation in radio broadcasting?
a) Amplitude modulation
b) Frequency modulation
c) Phase modulation
d) Pulse modulation
In a digital communication system, what is the purpose of error detection and correction?
a) To increase the bandwidth of the system
b) To reduce the signal-to-noise ratio
c) To increase the transmission rate
d) To improve the reliability of the system
Which of the following is not a type of multiplexing?
a) Frequency-division multiplexing
b) Time-division multiplexing
c) Code-division multiplexing
d) Pulse-code modulation
Which of the following is not a component of a digital communication system?
a) Encoder
b) Modulator
c) Demodulator
d) Amplifier
In a digital communication system, what is the purpose of the equalizer?
a) To remove noise from the signal
b) To amplify the signal
c) To correct distortions in the signal
d) To reduce the bandwidth of the signal
Which of the following is not a type of digital modulation?
a) Amplitude-shift keying
b) Frequency-shift keying
c) Phase-shift keying
d) Pulse-width modulation
Which of the following is not a type of digital communication system?
a) Ethernet
b) Bluetooth
c) Wi-Fi
d) AM radio
What is the main advantage of spread-spectrum modulation over other types of modulation?
a) Increased bandwidth
b) Increased signal-to-noise ratio
c) Resistance to interference
d) Improved accuracy
Which of the following is not a type of error in digital communication?
a) Bit error
b) Frame error
c) Signal-to-noise error
d) Burst error
Which of the following is not a component of a satellite communication system?
a) Transmitter
b) Receiver
c) Antenna
d) Modem
We hope there NEET MCQ of Class 12 Communication Systems will help you to score an excellent rank in NEET-UG. If you have any queries feel free to write in the comments section. We at Study Rate are always ready to serve our students.
