Question

With the increase in temperature, the nodal distance of the sound wave from an organ pipe:

• A. decreases
• B. increases
• C. remains constant
• D. none of the above

Answer 1

The correct option is A decreases

As the temperature increases, speed of the sound also increases since molecules vibrate faster, & sound can travel more quickly.

So, this changes the frequency (pitch) of sound waves in organ pipe, as frequency is equal to the speed of sound divided by wavelength.

Thus freq increases with the increase in temp.

This implies nodes increases.

$\therefore$ Nodal distance decreases.

Hence Option(A) is correct.