Question

If the temperature increases, then what happens to the frequency of the sound produced by the organ pipe?

• A. Increases
• B. Decreases
• C. Unchanged
• D. Not definite

Answer 1

The correct option is A Increases

Frequency of sound produced by organ pipe $\nu =\frac{nv}{2L}$

But velocity of sound in air depends on temperature, $v\propto \sqrt{T}$

$⟹$ $\nu \propto \sqrt{T}$

Hence the frequency of sound produced in organ pipe increases with the increase in temperature.