H C Verma Solutions for Chapter: Sound Waves, Exercise 2: OBJECTIVE I

An open organ pipe of length $L$ vibrates in its fundamental mode. The pressure variation is maximum

An organ pipe, open at both ends, contains [Consider only sound waves]

A cylindrical tube, open at both the ends, has a fundamental frequency $f$. The tube is dipped vertically in water so that half of its length is inside the water. The new fundamental frequency is

The phenomenon of beats can take place

A tuning fork of frequency $512 \mathrm{Hz}$ is vibrated with a sonometer wire, and $6$ beats per second are heard. The beat frequency reduces if the tension in the string is slightly increased. The original frequency of vibration of the string is

The engine of a train sounds a whistle at frequency $\nu$. The frequency heard by a passenger is

The change in frequency due to Doppler's effect does not depend on

A small source of sound moves on a circle, as shown in the figure and an observer is sitting at $O$. Let ${\nu }_1$, ${\nu }_2$ and ${\nu }_3$ be the frequencies heard, when the source is at $A$, $B$ and $C$, respectively. Then,