A tuning fork sounded together with a tuning fork of frequency 256 Hz emits two beats. On loading the tuning fork of frequency 256 Hz with wax, the number of beats heard are 1 per second. The frequency of the other tuning fork is :
(1) 257
(2) 258
(3) 256
(4) 254
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 :
(1) 250
(2) 252
(3) 260
(4) 262
Two tuning forks have frequencies 450 Hz and 454 Hz respectively. On sounding these forks together, the time interval between successive maximum intensities will be :
(1) 1/4 sec
(2) 1/2 sec
(3) 1 sec
(4) 2 sec
When a tuning fork of frequency 341 is sounded with another tuning fork, six beats per second are heard. When the second tuning fork is loaded with wax and sounded with the first tuning fork, the number of beats is two per second. The natural frequency of the second tuning fork is :
1. 334
2. 339
3. 343
4. 347
Tuning fork \(F_1\) has a frequency of 256 Hz and it is observed to produce 6 beats/second with another tuning fork \(F_2\). When \(F_2\) is loaded with wax, it still produces 6 beats/second with \(F_1\). The frequency of \(F_2\) before loading was:
1. 253 Hz
2. 262 Hz
3. 250 Hz
4. 259 Hz
Two tuning forks, A and B, vibrating simultaneously produce 5 beats. The frequency of B is 512 Hz. It is seen that if one arm of A is filed a little, then the number of beats increases. The frequency of A in Hz will be:
1. | 502 | 2. | 507 |
3. | 517 | 4. | 522 |
Beats are produced by two waves given by and . The number of beats heard per second is :
(1) Zero
(2) One
(3) Four
(4) Eight
A tuning fork whose frequency as given by manufacturer is 512 Hz is being tested with an accurate oscillator. It is found that the fork produces a beat of 2 Hz when oscillator reads 514 Hz but produces a beat of 6 Hz when oscillator reads 510 Hz. The actual frequency of the fork is :
(1) 508 Hz
(2) 512 Hz
(3) 516 Hz
(4) 518 Hz
When a tuning fork A of unknown frequency is sounded with another tuning fork B of frequency 256 Hz, then 3 beats per second are observed. After that A is loaded with wax and sounded, the again 3 beats per second are observed. The frequency of the tuning fork A is :
(1) 250 Hz
(2) 253 Hz
(3) 259 Hz
(4) 262 Hz
When two sound waves are superimposed, beats are produced when they have :
(1) Different amplitudes and phases
(2) Different velocities
(3) Different phases
(4) Different frequencies