Question

Statement I: When we start filling an empty bucket with water, the pitch of sound produced goes on decreasing.
Statement II: The frequency of man voice is usually higher than that of woman.

• A. If both Statement I and Statement II are true and the Statement II is correct explanation of the Statement I
• B. If both Statement I and Statement II are true but the Statement II is not the correct explanation of the Statement II
• C. If Statement I is true but Statement II is false
• D. If both the Statements are false

Answer 1

Answer: (D)

A bucket can be treated as a pipe closed at one end. The frequency of the note produced $=\frac{v}{4 L}$, here $L$ equal to depth of water level from the open end. As the bucket is filled with water $L$ decreases, hence frequency increases. Therefore, frequency or pitch of sound produced goes on increasing.
Also, the frequency of woman voice is usually higher than that of man.