Question

A string of guitar is struck first gently and than much harder the second time. Which of the following statement is true?

• A. Both loudness and pitch will remain unaffected.
• B. Sound will be louder but pitch will be lower.
• C. Sound will be louder but pitch will not be different.
• D. Sound will be louder and pitch will also be higher.

Answer 1

The correct option is C Sound will be louder but pitch will not be different.

Hitting the string with greater force will increase the amplitude of the vibrations and the sound wave. So, the loudness of sound will increase.
The frequency of the guitar string depends on the material, length and tension of the string. Since, none of these factors are changing, the frequency will remain the same. So, it will not affect the pitch of the sound.