Question 1 :
In the region of compression in longitudinal wave, the density of the medium
Question 2 :
When a string is divided into three segments of lengths $l_1, l_2, and l_3$, the fundamental frequencies of these three segments are $v_1, v_2 and v_3$, respectively. The original fundamental frequency (v) of the string is
Question 3 :
If the frequencies of the second and fifth harmonics of a string differ by 54 Hz. What is the fundamental frequency of the string ?
Question 4 :
When a longitudinal wave is incident at the boundary of denser medium, then ___________.
Question 5 :
A stretched string of length $l$ , fixed at both ends, can sustain stationary waves of wavelength $\lambda$, correctly given by<br>
Question 6 :
Name the device which is used to produce sound in laboratory experiments :<br/>
Question 7 :
A wave of length $2\space m$ is superposed in its reflected wave to form a stationary wave. A node is located at $x = 3m$, the next node will be located at $x = $
Question 8 :
What happens when the tine of tuning fork stretches inward from its normal position?<br>
Question 9 :
4 tuning forks of frequencies 100, 212 , 256 and 312 Hz are used as frequency sources to excite a wire of length 1 m. The speed of the wave that travels on this wire is 200 m/s. Which of these tuning forks will resonate with the wire:
Question 10 :
The tension in the sonometer wire is decreased by 4% by loosening the screws. It fundamental frequency
Question 11 :
On counting the number of compression or rarefaction crossing per unit time we can get
Question 12 :
What is known as compression when slinky is jerked to and forth <br>
Question 13 :
Two waves travelling in opposite directions along $\pm x$ axis. Their wave equations are expressed as<br/>$y_{1}=10\displaystyle \cos(\dfrac{x}{2}+5t)$ and <br/>$y_{2}=10\displaystyle \cos(\dfrac{x}{2}-5t)$<br/>where $x$ and $y$ are in $cms$ and $t$ is in $seconds$. After superposition, they form a standing wave. The amplitude at the nodes will be<br/>
Question 15 : <p>Two points on string are being observed as a travelling wave passes them. Then point are at ${x_1} = 0$ a ${x_2} = 1m$, the transverse motions of two points are found to be as follows. </p><p>${y_1} = A\sin \left( {3\pi t} \right)$ and ${y_2} = A\sin \left( {3\pi t + \dfrac{\pi }{8}} \right)$t is in seconds and y in metre. Mark correct options.</p>
Question 16 :
A brick is hung from a sonometer wire. If the brick is immersed in oil, then frequency of the wire will <br/>
Question 17 :
If in a stationary wave the amplitude corresponding to anti node is 4 cm, then the amplitude corresponding to a particle of medium located exactly between a node and an anti node is
Question 18 :
In density distance curve, the regions represented by the upper portions of the curve when particles are crowded together are :<br/>
Question 19 :
If one of the arms of a tuning fork is broken then its frequency of vibration is :<br/>
Question 21 :
Four wires of same length and same material, whose diameters are in the ratio $4:3:2:1$, are clamped in such a way that each wire produces note of frequency double that of the preceding wire. If the tension in the first wire is $2 kg-wt$, then tension in the second wire will be (in $kg-wt$)<br/>
Question 22 :
Which energy causes compression and rarefaction in air when tuning fork vibrates?<br>
Question 23 :
Two harmonic waves travelling in the same medium have frequency in the ratio 1:2 and intensity in the ratio 1: 36. Their amplitude ratio is:
Question 24 :
A sonometer wire of length $l_1$ vibrates with a frequency 250 Hz. If the length of wire is increased then 2 beats/s are heard. What is ratio of the lengths of the wire?
Question 27 :
What are the low pressure regions known as which are created when tuning fork vibrates?<br>
Question 28 :
Fundamental frequency of a sonometer wire is n. If the length and diameter of the wire are doubled keeping the tension same, then the new fundamental frequency is :
Question 30 :
Two tuning forks A, B vibrate with frequencies in the ratio 2 : 7 and their wavelengths in the ratio 3 : 4 respectively. The wave producing greater wavelength is :
Question 32 :
Speed of sound in air is 350 $ms^{-1}$, fundamental frequency of an open organ pipe of 50 cm length will be
Question 33 :
The tension in a piano wire is $10 N$. The tension in a piano wire to produce a node of double frequency is
Question 34 : <p>A tuning fork produces 20 vibrations per second. What is the frequency of the tuning fork?</p>
Question 35 :
The frequency of vibration of a sonometer wire is directly proportional to linear density of the wire:
Question 36 :
A simple instrument used to produce pure sound of fixed frequency is-
Question 37 :
Two strings of equal length are stretched out with equal tension. The second string is four times as massive as the first string. If a wave travels down the first string with velocity v, how fast does a wave travel down the second string?
Question 38 :
Two tuning forks 1 and 2 produces sound waves of frequency, $440 Hz$ and $880 Hz$ respectively. If ${v}_{1}$ denotes the speed of the sound waves produced by the first tuning fork and ${v}_{2}$ denotes the speed of the sound waves produced by the second turning fork, then find out which of following hold true?
Question 39 :
Uniform string of fundamental frequency of vibration f is divided into two segments by means of a bridge. If $f_1 and f_2$ are fundamental frequencies of these segments then.
