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The frequency of a FM transmitter withou...

The frequency of a FM transmitter without signal input is called

A

Lower side b and frequency

B

Upper side b and frequency

C

Resting frequency

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
c
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Knowledge Check

  • A: The bandwidth of a modulated signal is 2f_(m) in amplitude modulation, where f_(m) is the frequency of the modulating signal. R: In case of amplitude modulation the frequency of a modulated signal is equal to the frequency of the carrier wave.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion
    C
    If assertion is true but reason is false
    D
    If both assertion and reason are false.

  • An audio signal of 15 kHz frequency cannot be transmitted over long distance without modulation because.

    A
    the size of the required anteena would be at least 5 km which is not convenient.
    B
    the audio signal cannot be transmitted through sky waves.
    C
    the size of the required antenna would be at least 20 km, which is not convenient.
    D
    effective power transmitted would be very low, if the size of the antenna is less than 5 km

  • The range of frequency of audio signal is _________.

    A
    0 to 2 KHz
    B
    20 Hz to 20 MHz
    C
    20 Hz to 20 kHz
    D
    20 kHz to 200 kHz

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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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