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Length of a string tied to two rigid sup...

Length of a string tied to two rigid support is `40cm`. Maximum length (wavelength in cm) of a stationary wave produced on it is

A

20

B

80

C

40

D

120

Text Solution

Verified by Experts

The correct Answer is:
B
As the string is tied between two rigid supports hence there will be nodes at both ends. The longest wavelength for nodes at both ends will be the one
`l=(lamda)/(2)rArr lamda=2l`
`lamda_("longest")=2xx40=80cm`.
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