20.Two tuning forks have frequencies 200Hz and x.When they are sounded together 4 beats/ sec are heard.The value of x is

Two tuning forks have frequencies 380 and 384 Hz respectively. When they are sounded together they produce 4 beats. After hearing the maximum sound how long will it take to hear the minimum sound

Four tuning forks of frequencies 200,201,204 and 206 Hz are sounded together. The beat frequency will be

The frequecies of tuning forks A and B are respectively 5% more and 3% less than the frequency of tuning fork C. When A and B are sounded together 8 beats/second are heard. Then the frequency of the tuning fork B will be

When two tuning forks A and B are sounded together, 4 beats per second are head. The frequency of the fork B is 348 Hz. When one of the prongs of the fork A is filled and sounded with B, the beat frequency increases, then the frequency of the fork A is

Two tuning forks of frequencies 100 Hz and 95 Hz are sounded together. The time interval between two consecutive minima in the resultant sound is

Three tuning forks of frequencies 248 Hz, 250 Hz, 252 Hz, are sounded together.The beat frequency is,

Two tuning forks of frequencies 256 Hz and 258 Hz are sounded together. The time interval, between two consecutive maxima heard by an observer is