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The range over which frequencies in an i...

The range over which frequencies in an information signal varied is

A

bandwidth

B

power

C

admittance

D

Q- factor

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The correct Answer is:
A
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Modulation is the phenomenon of superimposing the low audio frequency base band message or information signals ( called the modulation signals) on a high frequency wave (called, the carrier wave). The resultant wave is called the modulated wave, which is transmitted. Read the above passage and answer the following questions: (i) What are the Audio Frequency and Radio Frequency ranges? (ii) Why audio frequency signals, as such cannot be transmitted over long distance? (iii) What does the phenomemom imply in day to day life ?

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Knowledge Check

  • The audible range of frequencies is

    A
    20kHz to 20MHz
    B
    20Hz to 20 kHz
    C
    20Hz to 20MHz
    D
    None of these

  • The device used for addition of high frequency carrier wave and information signal is

    A
    amplifier
    B
    rectifier
    C
    modulator
    D
    demodulator

  • The audible range of frequency is

    A
    20 Hz to 20,000 Hz
    B
    40 Hz to 40,000 Hz
    C
    60 Hz to 60,000 Hz
    D
    10 Hz to 20,000 Hz

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