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A wave of frequency 100 Hz is sent along...

A wave of frequency 100 Hz is sent along a string towards a fixed end. When this wave travels back after reflection, a node is formed at a distance of 10 cm frome the fixed end of the string. The speed of incident (and reflected) wave are

A

`5 m//s`

B

`10 m//s`

C

`20 m//s`

D

`40 m//s`

Text Solution

Verified by Experts

The correct Answer is:
C
`(lambda)/(2) = 10 cm or lambda = 20 cm = 0.20 m`
` v = v lambda = 100 xx 0.20 m//s = 20 m//s`
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