If two tuning forks $A$ and $B$ are sounded together, they produce $4$ beats per second. $A$ is then slightly loaded with wax, they produce $2$ beats when sounded again. The frequency of $A$ is $256.$ The frequency of $B$ will be
Medium
Download our app for free and get started
(b) $n_A $= Known frequency $= 256 Hz,$ $n_B = ?$
$x = 4\, bps$, which is decreasing after loading (i.e. $x\downarrow$)
also known tuning fork is loaded so $n_A\downarrow$
Hence $n_A\downarrow-n_B = x\downarrow $... $(i)$ $\rightarrow$ Correct
$n_B -n_A\downarrow = x\downarrow$ ... $(ii)$ $\rightarrow$ Wrong
==>$ n_B = n_A -x = 256 -4 = 252 Hz.$
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1A string is rigidly tied at two ends and its equation of vibration is given by $y = \cos 2\pi \,t\sin \sin \pi x.$ Then minimum length of string is .... $m$View Solution
- 2A narrow tube is bent in the form of a circle of radius $R,$ as shown in the figure. Two small holes $S$ and $D$ are made in the tube at the positions right angle to each other. A source placed at $S$ generated a wave of intensity $I_0$ which is equally divided into two parts : One part travels along the longer path, while the other travels along the shorter path. Both the part waves meet at the point $D$ where a detector is placed The maximum intensity produced at $D$ is given byView Solution
- 3A uniform rope of length $L$ and mass $m_1$ hangs vertically from a rigid support. A block of mass $m_2$ is attached to the free end of the rope. A transverse pulse of wavelength $\lambda _1$, is produced at the lower end of the rope. The wave length of the pulse when it reaches the top of the rope is $\lambda _2$. The ratio $\lambda _2\,/\,\lambda _1$ isView Solution
- 4A cylindrical tube $(L = 120\,cm.)$ is resonant with a tuning fork of frequency $330\,Hz$. If it is filling by water then to get resonance minimum length of water column is ..... $cm$ $(V_{air} = 330\,m/s)$View Solution
- 5The velocity of sound is $v_s$ in air. If the density of air is increased to $4$ times, then the new velocity of sound will beView Solution
- 6A police car moving at $22 m/s$, chases a motorcyclist. The police man sounds his horn at $176 Hz$, while both of them move towards a stationary siren of frequency $165 Hz$. Calculate the speed of the motorcycle, if it is given that he does not observes any beats .... $m/s$View Solution
- 7In a sonometer wire, the tension is maintained by suspending a $50.7 kg$ mass from the free end of the wire. The suspended mass has a volume of $ 0.0075 \, m^3$. The fundamental frequency of the wire is $260 Hz$. If the suspended mass is completely submerged in water, the fundamental frequency will become .... $Hz$ (take $g = 10 ms^{-2}$)View Solution
- 8View SolutionIn the musical octave ‘Sa’, ‘Re’, ‘Ga’
- 9View SolutionIn a stretched string,
- 10An observer moves towards a stationary source of sound of frequency $n$. The apparent frequency heard by him is $2n$. If the velocity of sound in air is $332\, m/sec, $ then the velocity of the observer is .... $m/sec$View Solution