1.

A string fixed at both ends has consecutive standing wave modes for which the distance between adjacent nodes are 18 cm and 16 cm respectively. The length of the string is -A. 144 cmB. 152 cmC. 176 cmD. 200 cm

Answer» `L=(mlambda_1)/2 and L(m+1) lambda_2/2`
Where m is no. of harmonic
m.36=(m+1)32 `rArr m=8`
`L=8xx18=144cm`


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