Beats
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See all →- In a guitar, two strings A and B made of same material are slightly out of tune and produce beats of frequency 6 Hz. When tension in B is slightly decreased, the beat frequency increases to 7 Hz. If the frequency of A is 530 Hz, the original frequenc… Answer: 2. 524 Hz Frequency of a string f∝√(T) . Decreasing tension of B lowers its frequency. Beat frequency was 6 Hz and rose to 7 Hz afte... 1
- Three sound waves of equal amplitudes have frequencies (n-1), n, (n+1). They superimpose to give beats. The number of beats produced per second will be Answer: 3. 2 Add the three waves of equal amplitude and see how the intensity repeats. y=A[cos2π(n-1)t+cos2π nt+cos2π(n+1)t]=Acos2π nt (1+2c... 1