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