1.

A stationary wave on a stretched string has an equation given by y = 10 sin (2pi x)/(3) cos 8 pit, where x and y are in cm and t is in second. Then separation between the two adjacent nodes is given by :

Answer»

1.5 cm
3 cm
`(1)/(3) `cm
`(1)/(6) ` cm

Solution :The general equation of stationary wave is
y = a sin kx cos `omega`t
y= 10 sin `(2pi x)/(3) ` cos 8`pi` t
sok = `(2pi)/(3) and omega = 8 pi `.
`(2pi)/(lambda) = (2pi)/(3)rArr lambda = 3` cm.
So DISTANCE between two CONSECUTIVE NODES
` = (lambda)/(2) = 1.5` cm .
correct CHOICE is a.


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