Question

A string of 0.3 m length is found to resonate in 3 segments (node at both the ends) when driving frequency is 20 Hz. The speed of wave in the string is -----

Answer 1

Explanation:

. Give the equations two lines passing through

Answer 2

Answer:

The speed of wave in the string is 4m

Explanation:

length of the string l=0.3m

Frequency of the wave f=20Hz

string resonated in three segments n=3segs

Resonating frequency of the string

$f = \frac{nv}{2l}$

Here

v is speed of the wave 8n string

n is no. of segments resonated by wave

l is lenth of the wave resonated

Here we have to find v speed of the wave

$v = \frac{2lf}{n}$

$= \frac{2 \times 0.3 \times 20}{3} = 4$

The speed of wave in the string is 4m

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