1.

A pulse is propagating on a long stretched string along its length taken as positive x-axis. Shape of the string at t = 0 is given by y=sqrt(a^(2) -x^(2)) when|x| le a=0when |x| > a What is the general equation of pulse after some time.t. , if it is travelling along positive x-direction with speed V ?

Answer»

`y(x,t) = SQRT(a^(2) -(x+VT)^(2))`, when `|x|Vt| le a = x+ Vt` when `|x + Vt| ge a`
`y(x,t) = sqrt(a^(2) + (x-Vt)^(2))`, when `|x-Vt| le a =a`, when `|x + Vt| ge 0`
`y(x,t) = sqrt(a^(2) -(x-Vt)^(2))`, when `|x-Vt| le a=0`, when `|x-Vt| ge a`
`y(x,t) = sqrt(a^(2) + (x+Vt)^(2))`, when `|x + Vt| le a =a`, when `(x+Vt) ge a`

Answer :C


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