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figure. Shows a student setting up wave ...

figure. Shows a student setting up wave wave on a long stretched string. The student's hand makes one complete up and down movement in `0.4 s` and in each up and down movement the hand moves by a height of `0.3 m`. The wavelength of the waves on the string is `0.8 m`.

The frequency of the wave is

A

`2.5 Hz`

B

`5 Hz`

C

`1.25 Hz`

D

Cannot be predicated

Text Solution

Verified by Experts

The correct Answer is:
a
Frequency`=(1)/("Time period" )=(1)/(0.4)=2.5 Hz`
Amlitude`=(1)/(2)xx0.3m=0.15m`
wave speed `=flambda=2.5xx0.8m=2m//s`
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