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A transverse wve given by Y = 0.021 sin (x + 30t) is propagating in a string of linear density 1.3 x, 10^(-4) kg/m. If x and y are in metres and time in seconds , the tension in string is : |
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Answer» 2.4 N here w = 30 rad /sec . And k = 1 `therefore V = (w)/(k) = (30)/(1) = 30 ms^(-1)` Now in strings v = `sqrt((T)/(m))` `therefore T = v^(2) .m = 900 xx 1.3 xx 10^(4) = 117 xx 10^(3) = 0.12 N ` hence the correct choice is (C). |
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