AP ECET ELECTRONICS AND COMMUNICATION ENGINEERING (ECE) Multiple Choice Questions (MCQs)
MCQs for AP ECET ECE - Advanced Communication Systems
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What is the primary function of the radiation resistance of an antenna?
- A) To determine the impedance of the antenna
- B) To define the bandwidth of the antenna
- C) To calculate the efficiency of the antenna
- D) To represent the power radiated by the antenna
-
Which antenna has the highest directivity?
- A) Dipole antenna
- B) Parabolic reflector
- C) Yagi antenna
- D) Turnstile antenna
-
In an antenna array, which type of array produces maximum radiation in the direction normal to the axis of the array?
- A) Broadside array
- B) End-fire array
- C) Parabolic array
- D) Circular array
-
What is the function of a folded dipole antenna?
- A) To increase the bandwidth of the antenna
- B) To increase the radiation resistance
- C) To improve the efficiency of the antenna
- D) To decrease the overall size of the antenna
-
Which of the following antennas is commonly used for television reception?
- A) Yagi antenna
- B) Parabolic reflector
- C) Turnstile antenna
- D) Loop antenna
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What is the primary function of a waveguide?
- A) To guide light through a medium
- B) To propagate high-frequency radio waves
- C) To reduce signal loss in fiber optic communication
- D) To convert electrical signals into electromagnetic waves
-
Which of the following is the dominant mode of a rectangular waveguide?
- A) TE10 mode
- B) TE11 mode
- C) TM01 mode
- D) TEM mode
-
In the context of radar, what does the range equation calculate?
- A) The frequency of the transmitted signal
- B) The maximum distance a radar can detect an object
- C) The power required to send a signal
- D) The direction of the incoming signal
-
What is the primary difference between CW (Continuous Wave) radar and MTI (Moving Target Indicator) radar?
- A) MTI radar detects both moving and stationary targets, while CW radar detects only moving targets
- B) CW radar has better range than MTI radar
- C) MTI radar uses a continuous wave signal, while CW radar uses a pulsed signal
- D) CW radar is used for communication, while MTI radar is used for navigation
-
What is the primary function of the satellite’s onboard system?
- A) To provide power to the satellite
- B) To communicate with the Earth station
- C) To track moving objects in space
- D) To handle the reception and transmission of signals
-
In satellite communication, what is the typical frequency range for the UP link?
- A) 1–2 GHz
- B) 2–4 GHz
- C) 5–10 GHz
- D) 30–40 GHz
-
Which type of fiber is used for long-distance communication in fiber optic systems?
- A) Single-mode fiber
- B) Multi-mode fiber
- C) Plastic optical fiber
- D) Hybrid fiber
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What is the function of an optical repeater in fiber optic communication?
- A) To convert optical signals into electrical signals
- B) To amplify optical signals and extend the communication distance
- C) To modulate the optical signals for transmission
- D) To filter unwanted signals from the communication link
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Which of the following is the primary advantage of Wavelength Division Multiplexing (WDM) in optical fiber communication?
- A) It increases the bandwidth by using multiple optical signals simultaneously
- B) It decreases the noise level in the communication channel
- C) It provides better error correction
- D) It reduces the overall cost of fiber optic cables
-
Which of the following cellular communication systems uses TDMA (Time Division Multiple Access)?
- A) AMPS
- B) GSM
- C) CDMA
- D) Wi-Fi
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