On sounding tuning fork A with another tuning fork B of frequency 384 Hz, 6 beats are produced per second. After loading the prongs of A with wax and then sounding it again with B, 4 Beats are produced per second, What is the frequency of the tuning fork A?

Question

anonymous · Answer

@Mashy

anonymous · Answer

i got 390 hz   is it correct

anonymous · Answer

@shubhamsrg

shubhamsrg · Answer

does frequency get reduced on waxing ?

anonymous · Answer

Yup

shubhamsrg · Answer

hmm
so beats inc when freq of A is reduced.
So I guess ans should be 378 ?

coz if after waxing, it'll reduce and no. of beats will inc

anonymous · Answer

v2 = v1 + - m

anonymous · Answer

Since on loading wax  freq deacreses so m shuld be + ve is nt it ?

shubhamsrg · Answer

As far as I recall, doesn;t freq increase on waxing? :|

anonymous · Answer

after waxing it will become heavier so freq decreases

anonymous · Answer

i think so....i am not sure abt this

shubhamsrg · Answer

http://www.askiitians.com/forums/General-Physics/9/30268/TUNING-FORK!!!!.htm

anonymous · Answer

ok then... ThXXx

shubhamsrg · Answer

but , as mass inc, freq should dec, I guess you are not wrong, am confused! :P

anonymous · Answer

Hm...Hm....Leave it , Its Getting too late...PLZ check my next question

shubhamsrg · Answer

well, it should decrease, you were right at the first place, but still then, ans should be 378

anonymous · Answer

Why?

anonymous · Answer

you are right.. its 390

shubhamsrg · Answer

ohh, of course, no.of beats decrease! sorry, my bad! :|