Question

A string 105 cm long is fixed at one end the other end of the string is moved up and down with frequency 15 hertz and wavelength of its string is 70 cm calculate the speed of wave in in m/s
(a 10.50
(b) 1.05
(c) 105
(d)0.105.
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Answer 1

Answer:

Correct option is

A

π/2

Speed of wave (v)=10m/s

Frequecy(γ)=100Hz

Wavelength(λ)=

100

10

=

10

1

ms

2π phase is covered in

10

1

m

Hence, at distance of 2.5 m, the phase is

0.1

2π×0.025

=

2

π