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A fork of unknown frequency gives 4 beat...

A fork of unknown frequency gives 4 beats per second when sounded with another of frequency `256`. The fork is now loaded with a piece of wax and again 4 beats per second are heard. Calculate the frequency of the unknown fork.

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The correct Answer is:
`260`
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A tunning fork of unknown frequency gives 4 beats per second when sounded with a fork of frequency 320 Hz. When loaded with little wax, it gives 3beats per second. Find the unknown frequency. [

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A tuning fork A of frequency 512 Hz sounded with another tuning fork B gives 5 beats/sec. On loading B with a piece of wax, and on sounding, again 5 beats/sec are produced. Calculate the frequency of fork B.

A tuning fork of unknown frequency makes 4.00 beats per second with a standard fork of frequency 384 Hz. The beat frequency decreases when a small piece of wax is put on a prong of the first fork. What is the frequency of this fork?

(a) A tuning fork produces 4 beats per second with another tuning fork of frequency 256 Hz . The first one is now loaded with a little wax and the beat frequency is found to increase to 6 per second. What was the original frequency of the tuning fork ? (b) A plano wire A vibrates at a fundamental frequncy of 600 Hz . A second identical wire B produces 6 betas per second with it, when of the tension in A is slightly increased. Find the ratio of the tension in A to the tension to B . ( c) A tunnig fork if frequency 256 Hz produces 4 beats per second with a wire of length 25 cm vibrating in its fundamental mode. The beat frequency decreases when the length is slightly shortened. What could be the minimum length by whech the wire be shortened so that it produces no beats with the tuning fork?

NN GHOSH-WAVE MOTION-EXERCISES
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  9. Two tuning forks A and B when sounded together produce 2 beats per sec...

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