Tag: elements of a communication system

Questions Related to elements of a communication system

A complete communication system must include:

physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

  1. a transmitter and receiver

  2. a transmitter, a receiver, and a channel

  3. a transmitter, a receiver, and a spectrum analyzer

  4. a multiplexer, a demultiplexer, and a channel

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Correct Option: C
Explanation:

A communication system requires a transmitter to upload the signal, a receiver to receive the signal and a channel to carry this information

An antenna is a device that converts

physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

  1. electromagnetic energy into radio frequency

    signal

  2. radio frequency signal into electromagnetic

    energy

  3. guided electromagnetic waves into free space

    electromagnetic waves

  4. free space electromagnetic waves into guided

    electromagnetic waves

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Correct Option: C,D
Explanation:

$Answer:-$ C ,D

An antenna (plural antennae or antennas), or aerial, is an electrical device which converts electric power (guided electromagnetic waves) into radio waves(free spaceelectromagnetic waves), and vice versa. It is usually used with a radio transmitter or radio receiver.

Basically, a communication system is a 

physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

  1. Transmitter

  2. Receiver

  3. Messenger

  4. all of these

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Correct Option: D

The collection of communication line and routers form the:

physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

  1. Router

  2. Bridge

  3. Submet

  4. Packet

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Correct Option: C
Explanation:

The collection of communication line and routers from the subnet.

The modulation frequency of an AM radio station is 250 kHz, which is 10% of the carrier wave. If another AM station approaches you for license what broadcast frequency will you allot ?

physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

  1. 2250 kHz

  2. 2900 kHz

  3. 2750 kHz

  4. 2000 kHz

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Correct Option: A

To double the covering range of a TV transmission tower, its height should be multiplied by :

physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

  1. 2

  2. 4

  3. $

    \sqrt{2}

    $

  4. $

    \frac{1}{\sqrt{2}}

    $

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Correct Option: A

The modulation frequency of an AM radio station is 250 kHz, which is 10% of the carrier wave. If another AM station approaches you for license what broadcast frequency will you allot ?

physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

  1. 2250 kHz

  2. 2900 kHz

  3. 2750 kHz

  4. 2000 kHz

Show answer
Correct Option: C