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Fill in the blanks with appropriate words: If a violin string is plucked strongly, its amplitude of vibration __________ (increases/decreases) and the note heard is_________ (louder/softer). If it is plucked lightly, its amplitude of vibration __________(increases/decreases) and the note heard is __________(louder/softer).

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To fill in the blanks, we need to understand the relationship between the amplitude of vibration and the loudness of the sound produced by a violin string when it is plucked with different strengths. 1. **First Blank**: If a violin string is plucked strongly, its amplitude of vibration __________ (increases/decreases). - When the string is plucked strongly, it vibrates with greater energy, leading to a larger displacement from its mean position. This means that the amplitude of vibration **increases**. 2. **Second Blank**: The note heard is __________ (louder/softer). - Since the amplitude of vibration has increased, the loudness of the sound produced also increases. Therefore, the note heard is **louder**. ...
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Knowledge Check

  • When the amplitude of vibrations of a simple pendulum is increased, then its time-period :

    A
    decreases
    B
    increases
    C
    remains the same
    D
    first increases and then decreases

  • If the frequency of vibrations of a body is decreased and its amplitude is increased, then

    A
    Both pitch and loudness of sound produced will decrease
    B
    Both pitch and loudness of sound produced will increase
    C
    Pitch increases but loudness decreases
    D
    pitch decreases but loudness increases

  • Loudness of sound increases by (i) The amplitude of vibrating body. (ii) The increase in surface area of vibrating body. (iii) The decrease in frequency of vibrating body. (iV) The increase in distance from the source of sound.

    A
    (i) and (ii) only
    B
    (i) and (iv) only
    C
    (ii) and (i) only
    D
    (vi) and (i) only

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