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A string 2.0 m long and fixed at its end...

A string 2.0 m long and fixed at its ends is driven by a 240 Hz vibrtor. The string vibrates in its third harmonic mode. The speed of the wave and its fundamental frequency is :

A

320m/s,120 Hz

B

180 m/s, 80Hz

C

180m/s, 120Hz

D

320m/s, 80 Hz

Text Solution

Verified by Experts

The correct Answer is:
D
`f_3 = (3v)/(2L) = 240`
`(3xxv)/(2 xx2) = 240 implies v = 320 m//s`
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