VERY SHORT ANSWER AND SHORT ANSWER QUESTIONS
- What do you mean by communication?
- What is a digital signal?
- What is an analog signal?
- Mention the different types of communication systems?
- What do you mean by radio communication?
- What is modulation?
- Distinguish modulating wave, carrier wave and modulated wave.
- What are the different methods of modullation?
- What is amplitude modulation?
- What is frequency modulation?
- What is phase modulation?
- Define modulation factor?
- Write an expression to describe the frequency spectrum of the modulated signal.
- What do you mean by bandwidth in amplitude modulation?
- Define frequency deviation.
- What are the limitations of amplitude modulation?
- Write an expression for modulation index.
- Write the advantages of frequency modulation.
- Give two disadvantages of frequency modulation.
- What is the importance of modulation index?
- What is demodulation?
- WHat is pulse amplitude modulation?
- Draw a schematic diagram to illustrate the basic elements of a communication system to transmit and receive audio signals.
- What is sampling?
- What is a modem?
- What is an artificial satellite?
- What is a geostationary satellite?
- What is remote sensing?
- Write the merits of satellite communication?
- Draw the basic circuit diagram for demodulatiom of am waves.
- What is UHF band?
- Write an expression for the range of transmission by a Tv antenna of height h.
- Which part of the electromagnetic spectrum is utilised for operating a radar?
- Why ground waves are limited to a frequency of 1500Hz?
- Name two primary requirements for optical transmission.
- What is an optical detector? Write its characteristics.
- What is FAX? Explain its working.
- What is email? How does it work?
- Explain PAM, PDM (PWM) and PPM
- Explain gow an analogue signal is converted to digital signal?
LONG ANSWER QUESTIONS
- Why is modulation necessary in long distance communication?
- Draw a circuit diagram for demodulation and explain its working.
- (a) Explain the use of geostationary satellites in communication. (b) Explain the working of remote sensing
- Explain the working of a modem.
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