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