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If at `t = 0`, a travelling wave pulse on a string is described by the function. `y = (6)/(x^(2) + 3)` What will be the waves function representing the pulse at time `t`, if the pulse is propagating along positive x-axis with speed `4m//s`?A. `y=(6)/(x+4t)^(2) +3`B. `y=(6)/(x - 4t)^(2) +3`C. `y =(6)/(x - t)^(2)`D. `y =(6)/(x - t)^(2)+12` |
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Answer» Correct Answer - B The wave pulse is travelling along positive x-axis. Hence, at and bx should have opposite signs. Further, wave speed `v = ("Coefficient of t")/("Coefficient of x")` `:. 4 = ("Coefficient of t")/(1)` `:. "Coefficient of" `t = 4 s^(-1)` |
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