A source of unknown frequency gives 4 beats per second when sounded with a source of frequency 250 Hz. The second harmonic of the source of unknown frequency gives 5 beats per second when sounded with a source of frequency 513 Hz. The unknown frequency is :

A source of unknown frequency gives 4 beats//s, when sounded with a source of known frequency 250 Hz. The second harmonic of the source of unknown frequency gives five beats per second, when sounded with a source of frequency 513 Hz .The unknown frequency is

A source frequency f gives 5 beats when sounded with a frequency 200Hz. The second harmonic of same source gives 10 beats when sounded with a source of frequency 420Hz. The value of f is

A source frequency f gives 5 beats when sounded with a frequency 200Hz. The second harmonic of same source gives 10 beats when sounded with a source of frequency 420Hz. The value of f is

A tunning fork of unknown frequency gives 4 beats per second when sounded with a fork of frequency 320Hz. When loaded with a little wax it give 3 beats per second. Find the unknown frequency.

A tuning fork of unknown frequency produces 4 beats per second when sounded with another tuning fork of frequency 254 Hz. It gives the same number of beats per second when unknown tuning fork loaded with wax . The unknown frequency before loading with wax is

An unknown frequency x produces 8 beats per seconds with a freuquency of 250 Hz and 12 beats with 270Hz . Source then x is

A tuning fork produces 2 beats per second when sounded with another tuning fork of frequency 250 Hz. It gives the same number of beats per second when loaded with wax. The initial frequency of 1^(st) tuning fork is

A tuning fork of unknown frequency produoed 4 beats per second when sounded with a standard fork of frequency 256 Hz. The beat frequency decreased when a little wax was pot on a prong of the first fork. What was the frequency of the fork before loading it with wax ?

A tuning fork A frequency 384Hz gives 6 beats in 2 seconds when sounded with another tuning fork B. What could be the frequency of B?

A source of sound produces 6 beats per second with a tuning fork when the source frequency is either 578 hz or 590 hz. The frequency of tuning fork is