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The length of a string attached to two r...

The length of a string attached to two rigid supports is 40 cm. The maximum 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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