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Communication Systems in Electrical Engineering
Contributed by: Parkin
  • 1. Communication systems in electrical engineering involve the transmission, reception, processing, and storage of information through electrical signals. These systems play a crucial role in facilitating the exchange of data and messages between different devices and users. Key components of communication systems include transmitters, receivers, channels, and protocols. The design and analysis of communication systems aim to ensure efficient and reliable transfer of information while considering factors such as bandwidth, noise, and data rate. Engineers in this field work on developing technologies such as wireless communication, optical networks, and satellite communication to enhance connectivity and enable communication across various platforms and distances.

    What is the Shannon capacity formula in communication systems?
A) C = B * log2(1 + SNR)
B) C = B * SNR
C) C = B / log2(1 + SNR)
D) C = log2(1 + SNR)
  • 2. What is the role of a repeater in communication systems?
A) To modulate signals
B) To amplify and retransmit signals
C) To digitize analog signals
D) To filter out noise from signals
  • 3. What is the function of a demodulator in a communication system?
A) To extract the original message signal from the modulated signal
B) To attenuate the signal
C) To encode the message signal
D) To transmit the signal
  • 4. What does BER stand for in communication systems?
A) Bit Error Rate
B) Baseband Error Rate
C) Binary Encoding Rate
D) Bandwidth Error Rate
  • 5. What is the Nyquist theorem used for in communication systems?
A) To modulate signals
B) To determine the maximum data rate over a channel
C) To equalize signals
D) To amplify signals
  • 6. What is the purpose of error detection codes in communication systems?
A) To compress data
B) To detect and correct errors in transmitted data
C) To encrypt data
D) To increase data transmission speed
  • 7. In communication systems, what does ADC stand for?
A) Amplitude Domain Converter
B) Analog-to-Digital Converter
C) Analog Digital Channel
D) Automatic Data Communication
  • 8. What is meant by the term 'duplexing' in communication systems?
A) Error correction in data transmission
B) Analog to digital signal conversion
C) Simultaneous transmission and reception on a common channel
D) Frequency modulation of signals
  • 9. What is the purpose of a splitter in distribution systems?
A) To combine signals into a single path
B) To amplify signals
C) To filter out noise
D) To divide a signal into multiple paths
  • 10. What is the primary function of a router in communication networks?
A) To route data packets between different networks
B) To modulate signals
C) To amplify signals
D) To convert analog signals to digital signals
  • 11. What is the purpose of a transceiver in communication systems?
A) To amplify signals
B) To filter out noise
C) To both transmit and receive signals
D) To encode signals
  • 12. What does the acronym CDMA stand for in communication systems?
A) Centralized Data Modulation Algorithm
B) Code Division Multiple Access
C) Channel Division Multiplexing Array
D) Coordinated Domain Modulation Approach
  • 13. Which of the following is true about the bandwidth of a signal in communication systems?
A) It is the rate of signal transmission
B) It is the amplitude of the signal
C) It is the range of frequencies occupied by the signal
D) It is the time duration of the signal
  • 14. What is the role of a network switch in communication networks?
A) To encrypt data
B) To connect devices within a local area network and forward data packets
C) To convert digital signals to analog signals
D) To modulate signals
  • 15. What does the term 'echo cancellation' refer to in communication systems?
A) Creating echo effects on signals
B) Removing echo from transmitted signals
C) Shifting signals in time
D) Amplifying echo in signals
  • 16. Which protocol is commonly used for email communication over the Internet?
A) TCP (Transmission Control Protocol)
B) FTP (File Transfer Protocol)
C) HTTP (Hypertext Transfer Protocol)
D) SMTP (Simple Mail Transfer Protocol)
  • 17. What is a multiplexer used for in communication systems?
A) To combine multiple input signals into a single output
B) To decompress audio signals
C) To detect errors in transmitted data
D) To convert analog signals to digital signals
  • 18. In digital communication, what does 'SNR' stand for?
A) Signal-to-Noise Ratio
B) Signal Neutralization Rate
C) Symbol Noise Reduction
D) System Network Requirement
  • 19. Which of the following is an example of a digital communication protocol?
A) TCP/IP
B) Analog TV
C) FM Radio
D) Satellite Communication
  • 20. Which of the following is a common frequency band used for Wi-Fi communication?
A) 10 kHz
B) 1000 GHz
C) 500 MHz
D) 2.4 GHz
  • 21. Which of the following components is typically used for signal amplification in a communication system?
A) Amplifier
B) Transmitter
C) Modem
D) Antenna
  • 22. What does the acronym 'AM' stand for in communication systems?
A) Audio Modulation
B) Analog Multiplexing
C) Amplitude Modulation
D) Amplification Method
  • 23. Which of the following is a digital modulation technique?
A) Phase Shift Keying (PSK)
B) Frequency Hopping Spread Spectrum
C) Continuous Wave Modulation
D) Quadrature Amplitude Modulation (QAM)
  • 24. Which type of modulation is used in Bluetooth communication technology?
A) Phase Modulation
B) Frequency Hopping Spread Spectrum (FHSS)
C) Pulse Width Modulation
D) Amplitude Modulation
  • 25. Which of the following is a common method for achieving error detection in digital communication?
A) Pulse Code Modulation (PCM)
B) Frequency Division Multiplexing (FDM)
C) Cyclic Redundancy Check (CRC)
D) Amplitude Modulation (AM)
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