➤ Hello In this page provides you Question/MCQ In this question Based on the Modulation ,Demodulation, pulse code modulation shift keying and ASK,FSK,PSK etc.
Q.1 What is demodulation in communication systems?
- A) Detection
- B) Recovering information from the modulating signal
- C) Both A & B
- D) None
Q.2 Which of the following parameters remains constant in Amplitude Modulation (AM)?
- A) Amplitude
- B) Frequency
- C) Phase
- D) Both B & C
Q.3 Which of the following are recognized AM demodulation techniques?
- A) Square law Demodulator
- B) Envelope Detector
- C) Phase Discriminator
- D) Both A & B
Q.4 The process of recovering the original information signal from the received carrier is specifically known as?
- A) Modulation
- B) De-Modulation
- C) Detection
- D) None
Q.5 What is the full form of FM in the context of signal modulation?
- A) Frequency Module
- B) Fresh Modulation
- C) Frequency Modulation
- D) None
Q.6 Signal transmission where no power is consumed by the carrier itself is known as?
- A) Amplitude Modulation
- B) Frequency Modulation
- C) Sideband suppressed carrier signal
- D) None
Q.7 Why is modulation required in wireless communication?
- A) Reducing noise during transmission
- B) Reduction of antenna height
- C) Multiplexing multiple signals
- D) All of the above
Q.8 What are the primary advantages of using an RF amplifier in a receiver?
- A) Better Sensitivity
- B) Improved signal-to-noise ratio
- C) Better selectivity
- D) All of the above
Q.9 In many networking contexts (like modems), modulation is the activity used to convert?
- A) Analog to Digital
- B) Digital to Analog
- C) Digital to Binary
- D) None
Q.10 In many networking contexts, demodulation is the activity used to convert?
- A) Analog to Digital
- B) Digital to Analog
- C) Digital to Binary
- D) None
Q.11 Which of the following are examples of low-level modulation circuits?
- A) Square law diode modulation
- B) Switching modulation
- C) Packet modulation
- D) Both A & B
Q.12 Which of the following is true regarding the phase shift method of SSB generation?
- A) Includes two balanced modulators
- B) Uses two phase shifting networks
- C) Avoids the use of bulky filters
- D) All of these
Q.13 Which of the following occurs during the synchronous detection of an AM signal?
- A) A carrier is locally generated
- B) The signal is passed through a low pass filter
- C) The original signal is accurately recovered
- D) All of these
Q.14 What is the full form of PM in modulation technology?
- A) Phase Modulation
- B) Passed Modulation
- C) Phase Module
- D) None
Q.15 A Ring Modulator is characterized by which of the following?
- A) Used for DSB-SC generation
- B) Consists of four diodes in a ring
- C) Acts as a product modulator
- D) All of these
Q.16 Which of these are standard AM demodulation techniques?
- A) Square law demodulator
- B) Envelope detector
- C) PLL Detector
- D) Both A & B
Q.17 What are the characteristics of square law modulators?
- A) Non-linear current-voltage characteristics
- B) Used for Amplitude Modulation
- C) Used for Frequency Modulation
- D) Both A & B
Q.18 Which type of amplifier is typically used for low-level modulation?
- A) Class A
- B) Class C
- C) Class B
- D) None
Q.19 What does the acronym QAM stand for in networking and modulation?
- A) Quadrature Amplitude Modulation
- B) Quadrature Amplitude Module
- C) Quadrature Applied Modulation
- D) None
Q.20 What does the acronym AGC stand for in communication receivers?
- A) Automatic Gain Control
- B) Automation Gain Control
- C) Automatic gain Control
- D) None