Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 86
Q1161:
In Amplitude Modulation (AM), the information signal is combined with a _______.
A. Carrier signal
B. Noise signal
C. Digital signal
D. Modulated wave
Correct Answer:
A
Chapter: 86
Q1162:
The process of varying the amplitude of a carrier signal based on an input signal is known as _______.
A. Frequency Modulation
B. Amplitude Modulation
C. Phase Modulation
D. Pulse Modulation
Correct Answer:
B
Chapter: 86
Q1163:
Which of the following is NOT an application of Amplitude Modulation?
A. AM Radio
B. Television Broadcasting
C. Frequency Hopping
D. Two-way radio communication
Correct Answer:
C
Chapter: 86
Q1164:
In AM, what remains constant while the amplitude changes?
A. Frequency
B. Amplitude
C. Wavelength
D. Bandwidth
Correct Answer:
A
Chapter: 86
Q1165:
The modulation index in AM determines _______.
A. Carrier Frequency
B. Power Efficiency
C. Noise Resistance
D. Bit Rate
Correct Answer:
B
Chapter: 86
Q1166:
Which type of modulation varies the amplitude of the carrier signal?
A. Frequency Modulation
B. Phase Modulation
C. Amplitude Modulation
D. Pulse Code Modulation
Correct Answer:
C
Chapter: 86
Q1167:
The efficiency of AM transmission depends on _______.
A. Carrier Power
B. Modulation Index
C. Frequency Bandwidth
D. Signal Latency
Correct Answer:
B
Chapter: 86
Q1168:
The main disadvantage of Amplitude Modulation is _______.
A. High noise susceptibility
B. Low power consumption
C. Complexity of implementation
D. High bandwidth requirement
Correct Answer:
A
Chapter: 86
Q1169:
In AM, which component carries the actual message information?
A. Carrier wave
B. Sidebands
C. Noise signal
D. Modulated wave
Correct Answer:
B
Chapter: 86
Q1170:
The frequency range for AM broadcasting is typically between _______.
A. 500 Hz - 5 kHz
B. 530 kHz - 1700 kHz
C. 1 MHz - 100 MHz
D. 88 MHz - 108 MHz
Correct Answer:
B
Chapter: 86
Q1171:
The bandwidth of an AM signal is _______ times the modulating frequency.
A. Equal to
B. Two
C. Half
D. Four
Correct Answer:
B
Chapter: 86
Q1172:
In AM, the upper and lower sidebands contain _______.
A. The same information
B. Different signals
C. Noise only
D. High-frequency components
Correct Answer:
A
Chapter: 86
Q1173:
Amplitude Modulation is commonly used in _______.
A. AM Radio
B. Cellular Networks
C. Digital Television
D. Satellite Communications
Correct Answer:
A
Chapter: 86
Q1174:
The carrier frequency in an AM signal is usually _______ than the modulating frequency.
A. Lower
B. Higher
C. Equal
D. Variable
Correct Answer:
B
Chapter: 86
Q1175:
The primary function of a modulator in AM transmission is to _______.
A. Increase signal power
B. Combine carrier and message signals
C. Filter noise
D. Decode the signal
Correct Answer:
B
Chapter: 86
Q1176:
The total power in an AM wave is the sum of _______.
A. Carrier and noise power
B. Carrier and sideband power
C. Sidebands only
D. Modulating frequency power
Correct Answer:
B
Chapter: 86
Q1177:
The depth of modulation in AM is represented by the _______.
A. Frequency ratio
B. Modulation index
C. Phase shift
D. Carrier power
Correct Answer:
B
Chapter: 86
Q1178:
What is the function of an envelope detector in AM demodulation?
A. Amplify the signal
B. Detect the amplitude variations
C. Eliminate noise
D. Shift the frequency
Correct Answer:
B
Chapter: 86
Q1179:
Amplitude Modulation (AM) is used in which of the following?
A. Optical fiber communication
B. Standard AM radio broadcasting
C. Wireless LAN
D. Bluetooth
Correct Answer:
B
Chapter: 86
Q1180:
The bandwidth of an AM signal is determined by _______.
A. Carrier frequency
B. Modulating signal frequency
C. Antenna gain
D. Transmission distance
Correct Answer:
B