Advertisements
Advertisements
प्रश्न
A tuning fork A, marked 512 Hz, produces 5 beats per second, where sounded with another unmarked tuning fork B. If B is loaded with wax the number of beats is again 5 per second. What is the frequency of the tuning fork B when not loaded?
Advertisements
उत्तर
Given that, vA = 512
On loading, frequencies of B decreased
So, in the first case v1 = 5
⇒ vB = vA ± 5
When B is loaded, the frequency of B becomes,
⇒ vB = 512 ± 5
We can write it as,
⇒ vB = 507 or vB = 517
On load in the frequency of B decreased by 507 to lower value of the number of beats will increase so vB ≠ 507
If vB = 517 then its frequency decreases by 10 Hz by then the number of beats will also be the same as 512 – 507 = 5.
Thus, the frequency of the tuning fork B when not loaded is 517 Hz.
APPEARS IN
संबंधित प्रश्न
Explain why (or how) A violin note and sitar note may have the same frequency, yet we can distinguish between the two notes,
Doppler effect is not applicable when _______.
(A) source and observer are at rest.
(B) there is a relative motion between source and observer.
(C) both are moving in opposite directions.
(D) both are moving in same direction with different velocities
Apparent frequency of the sound heard by a listener is less than the actual frequency of sound emitted by source. In this case _______.
(A) listener moves towards source
(B) source moves towards listener
(C) listener moves away from the source.
(D) source and listener move towards each other.
State any four applications of Doppler effect
A set of 8 tuning forks is arranged in a series of increasing order of frequencies. Each fork gives 4 beats per second with the next one and the frequency of last fork is twice that of the first. Calculate the frequencies of the first and the last fork.
When the observer moves towards the stationary source with velocity, 'V1', the apparent frequency of the emitted note is 'F1'. When the observer moves away from the source with velocity 'V1', the apparent frequency is 'F2'. If 'V' is the velocity of sound in air and `"F"_1/"F"_2 = 4` then `"V"/"V"_1 = ?`
A tuning fork 'A' produces 5 beats per second with a tuning fork of frequency 480 Hz. When a little wax is stuck to a prong of fork A, the number of beats heard per second becomes 2. What is the frequency of tuning fork A before the wax is stuck to it?
A pipe closed at one end has a length of 1m and at its open end, 0.25 m long uniform string is vibrating in its third harmonic and resonates with a fundamental frequency of pipe. If the tension in the string is 100 N and the speed of sound is 340 `m/s`, then the mass of the string is near ______
Two identical wires are vibrating in unison. If the tension in one of the wires is increased by 2%, five beats are produced per second by the two vibrating wires. The initial frequency of each wire is ______
`(sqrt(1 . 0.2) ≑ 1 . 0.1)`
Two wires are producing fundamental notes of the same frequency. Change in which of the following factors of one wire will NOT produce beats between them?
A note produces 4 beat/s with a tuning fork of frequency 510 Hz and 6 beat/s with a fork of frequency 512 Hz. The frequency of the note is ______
When two waves of almost equal frequencies n1 and n2 reach at a point simultaneously, what is the time interval between successive maxima?
The velocity of sound in a gas in which two wavelengths 4.08m and 4.16m produce 40 beats in 12s, will be ______.
Two light waves of intensities 'I1' and 'I2' having same frequency pass through same medium at a time in same direction and interface. The sum of the minimum and maximum intensities is ______.
Two tuning forks of frequencies 320 Hz and 340 Hz are sounded together to produce a sound wave. The velocity of sound in air is 326.4 m/s. Calculate the difference in wavelengths of these waves.
If beat frequency is 2 Hz, what is the time interval between success waxings?
A sonometer wire under a tension of 40 N vibrates in unison with a tuning fork of frequency 384 Hz. Find the beat frequency when the tension in the wire is reduced by 0.21 N.
One beat means that the intensity of sound should be ______.
A tuning fork and a vibrating sonometer wire give 6 beats per second, either with a length of the wire of 1.0 m or 1.06 m. The frequency of the fork is
