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Time to Boost Your Memory!
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Question 1
Which of the following is not a basic element of the communication process?
Transmitter
Receiver
Noise
Radio Frequency (RF)
Question 2
What is meant by noise factor in a communication system?
The ratio of the output power to the input power
The ratio of the signal to noise power at the output
The amount of noise introduced by the transmitter
The frequency at which noise occurs
Question 3
What does attenuation refer to in a communication system?
Increase in signal strength
A decrease in signal strength due to resistance
The ability to amplify signals
The modulation of signals
Question 4
What is the purpose of amplification in a communication system?
To reduce the signal strength
To increase the frequency of the signal
To increase the strength of the signal for transmission over longer distances
To modulate the signal
Question 5
What is the purpose of modulation in communication systems?
To reduce noise in the signal
To allow signals to travel through air or other media
To change the frequency of the transmitted signal to match the channel's frequency range
To increase the power of the signal
Question 6
Which of the following is an example of baseband modulation?
Frequency Modulation (FM)
Amplitude Modulation (AM)
Phase Modulation (PM)
Pulse Code Modulation (PCM)
Question 7
Which of the following statements correctly distinguishes modulation from demodulation?
Modulation is the process of extracting the original signal, while demodulation is the process of modifying the signal
Modulation increases the signal strength, while demodulation reduces it
Modulation is the process of varying the carrier signal to encode information, while demodulation is the reverse process
Modulation is used to convert analogue signals to digital signals, while demodulation converts digital signals to analogue
Question 8
What is the effect of noise on a communication system?
It enhances the signal quality
It causes a decrease in the signal-to-noise ratio (SNR)
It has no effect on the system
It increases the bandwidth of the signal
Question 9
Which of the following modulation types is used in FM radio broadcasting?
Amplitude Modulation (AM)
Frequency Modulation (FM)
Phase Modulation (PM)
Pulse Code Modulation (PCM)
Question 10
What causes attenuation in optical fibre communication systems?
Reflection of light at the interface
Absorption and scattering of light
Amplification of the signal
Diffraction of light
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