Question

A key of a mechanical piano is struck gently and then struck again but much harder this time. In the second case, sound will be ___.

• A. louder but pitch will be the same
• B. louder and pitch will be higher
• C. feeble and pitch will be higher
• D. feeble and pitch will be the same

Answer 1

The correct option is A louder but pitch will be the same

When the key is struck harder, the amplitude of vibrations will be more. Hence, sound will be louder However, pitch will remain unchanged, because each key in a piano has a string attached to it that vibrates with a fixed frequency.