Modulation is the process of superposing
- low frequency audio signal on high frequency waves
- low frequency radio signal on low frequency audio waves
- high frequency radio signal on low frequency audio signal
- high frequency audio signal on low frequency radio waves
The Correct Option is A
Solution and Explanation
Top Questions on communication systems
In amplitude modulation, the amplitude of the carrier signal is 28 V and the modulation index is 0.4. The amplitude of the side bands is:
- AP EAMCET - 2024
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A proton and an alpha particle are moving with kinetic energies of 4.5 MeV and 0.5 MeV respectively. The ratio of the de Broglie wavelengths of the proton and alpha particle is:
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Questions Asked in KEAM exam
- The minimum value of \( f(x) = 7x^4 + 28x^3 + 31 \) is:
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A ball is projected in still air. With respect to the ball the streamlines appear as shown in the figure. If speed of air passing through the region 1 and 2 are \( v_1 \) and \( v_2 \), respectively and the respective pressures, \( P_1 \) and \( P_2 \), respectively, then
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If the voltage across a bulb rated 220V – 60W drops by 1.5% of its rated value, the percentage drop in the rated value of the power is:
- The electric power delivered by a transmission cable of resistance \( R_c \) at a voltage \( V \) is \( P \). The power dissipated is
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- Mobility \( \mu \) of an electron is related to average collision time \( \tau \) as: \[ \mu = \frac{e \tau}{m} \] (where \( e \) is the electronic charge, and \( m \) is the mass of the electron)
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Concepts Used:
Communication Systems
A system that describes the information exchange between two points is called the communication system. The transmission and reception process of information is called communication. The major elements of communication are such as:
- The Transmitter of information
- Channel or medium of communication
- The Receiver of information
Examples Of Communication Systems:
The following are the examples of communication systems:
- Internet
- Public Switched Telephone network
- Intranet and Extranet
- Television
Types Of Communication Systems:
Turning on Signal specification or technology, the communication system is categorized as follows:
- Analog technology communicates data as electronic signals of differing frequencies or amplitude. For instance Broadcast and telephone transmission.
- In Digital technology, the data are created and processed in two states: High (represented as 1) and Low (represented as 0). Also this technology stores and transmits data in the form of 1's and 0's.
Elements of a Communication System:
