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The length of string of a musical instru...

The length of string of a musical instrument is 90 cm and has fundamental frequency of 120 Hz where should it be pressed to produce fundamental frequency of 180 Hz

A

60 cm

B

45 cm

C

80 cm

D

75 cm

Text Solution

Verified by Experts

The correct Answer is:
A

`f = 120 Hz = v/(2l) implies 120 = v/(2(0.9))`

`f = 180 Hz = v/(2l)`
`implies 180 = (120 xx 0.9)/l implies l = 60 cm`
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