Question

22. The equation of a stationary wave along a vi-
brating string is given by y=0.02 cos (8 tt)
sin (100 n t) in S.I. units. The amplitude and
velocity of the component waves are
A) 0.1 m and 1.25 m/sec B) 0.01 m and 12.5 m/sec
C) 1 m and 125 m/sec D 2 m and 250 m/sec​

Answer 1

Explanation:

y=5sin(

3

πx

).cos(4πt)

Hereinaboveequationk=

3

π

λ

2π

=

3

π

λ=6cm

Hence,distancebetween2nodesis

2

λ

=3cm

Hence, the option B is the correct answer.