A sinusoidal wave travels along a taut string of linear mass density `0.1g//cm`. The particles oscillate along `y-`direction and wave moves in the positive `x-` direction. The amplitude and frequency of oscialltion are `2 m m` and `50 Hz` respectively. The minimum distance between two particles oscillating in the same phase is `4m`.
The tension in the string is `(` in newton `)`

Options

A. 4000
B. 400
C. 25
D. 250

Answer

B

Explanation

`lambda =4m` and `f=500 Hz.`
`:. V=f lambda=200m//s`
`:' V=sqrt((T)/(mu)):. T=mu v^(2)=(0.1)xx(200)^(2)=400N`