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1.
Stationary waves
2.
A sound wave of wavelength 
enters the tube at 
as shown in the figure. Then the smallest radius 
so that a minimum of sound is heard at detector 
is
enters the tube at as shown in the figure. Then the smallest radius so that a minimum of sound is heard at detector is
3.
A source of sound gives 5 beats 
when sounded with another source of frequency 100 Hz. The second harmonic of the source together with a source of frequency 205 Hz gives 5 beats . What is the frequency of the source?
when sounded with another source of frequency 100 Hz. The second harmonic of the source together with a source of frequency 205 Hz gives 5 beats . What is the frequency of the source?
4.
Given that 
where 
and 
are measured in metres. Which of the following statements is true
where and are measured in metres. Which of the following statements is true
5.
Which two of the given transverse waves will give stationary waves when get superimposed
6.
In 1 m long open pipe what is the harmonic of resonance obtain with a tuning fork of frequency 480 Hz?
7.
A uniform wire of length L, diameter D and density S is stretched under a tension T. the correct relation between its fundamental frequency f, the length L and the diameter D is
8.
A micro-wave and an ultrasonic sound wave have the same wavelength. Their frequencies are in the ratio (approximately)
9.
An engine approaches a hill with a constant speed. When it is at a distance of 
it blows a whistle, whose echo is heard by the driver after 
If speed of sound in air is 
the speed of engine is
it blows a whistle, whose echo is heard by the driver after If speed of sound in air is the speed of engine is
10.
Walls of auditorium should be