Prepare for NEET Physics Communication System with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert guidance to understand signal transmission and reception.
A signal with bandwidth 20 kHz is being transmitted using amplitude modulation. To prevent overlapping of sidebands and allow for efficient filtering at the receiver, what is the minimum required carrier frequency?
10 kHz
20 kHz
40 kHz
80 kHz
In a frequency modulated wave, the instantaneous frequency varies between 100.01 MHz and 99.99 MHz. If the audio signal frequency is 1 kHz, what is the frequency deviation?
1 kHz
5 kHz
10 kHz
20 kHz
A message signal of frequency 10 kHz and peak voltage 10 V is used to modulate a carrier wave of frequency 1 MHz and peak voltage 20 V. If the modulation index is 0.5, what is the peak voltage of the upper sideband?
2.5 V
5 V
10 V
20 V
The process of converting a message signal into a form suitable for transmission is called:
Modulation
Demodulation
Amplification
Detection
In amplitude modulation, the message signal is encoded in the ______ of the carrier wave.
Amplitude
Frequency
Phase
Wavelength
The process of retrieving the message signal from the modulated carrier wave is known as:
Demodulation
Modulation
Transmission
Reception
Which type of modulation is most susceptible to noise?
Amplitude Modulation
Frequency Modulation
Phase Modulation
Pulse Code Modulation
A message signal of frequency 10 kHz and peak voltage of 10 V is used to modulate a carrier of frequency 1 MHz and peak voltage of 20 V. What is the modulation index?
0.2
0.5
2.0
1.0
In frequency modulation, the amplitude of the carrier wave is:
Constant
Varied according to the message signal
Zero
Equal to the message signal amplitude
The process of recovering the message signal from the modulated carrier wave is known as:
Modulation
Demodulation
Amplification
Transmission
