1.

A student tunes his guitar by striking a 120 Hertz with a tuning fork, and simultaneously plays the 4^(th) string on his guitar. By keen observation, he hears the amplitude of the combined sound oscillating thrice per second. Which ofthe following frequency is the most likely the frequency of the 4^(th) string on his guitar ?

Answer»

130
117
110
120

Solution :117


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