A wave in a string has an amplitude of `2 cm`. The wave travels in the `+ve` direction of x axis with a speed of 1`28 ms^-1` and it is noted that `5` complete waves fit in `4 m` length of the string. The equation describing the wave isA. y = (0.02)m sin (7.58x – 1005 t)B. y = (0.02)m sin (7.85x + 1005 t)C. y = (0.02)m sin (15.7x – 2010 t)D. y = (0.02)m sin (15.7x + 2010 t)

A wave in a string has an amplitude of `2 cm`. The wave travels in the

1.	A wave in a string has an amplitude of `2 cm`. The wave travels in the `+ve` direction of x axis with a speed of 1`28 ms^-1` and it is noted that `5` complete waves fit in `4 m` length of the string. The equation describing the wave isA. y = (0.02)m sin (7.58x – 1005 t)B. y = (0.02)m sin (7.85x + 1005 t)C. y = (0.02)m sin (15.7x – 2010 t)D. y = (0.02)m sin (15.7x + 2010 t)
Answer» Correct Answer - A `5 lambda=4 ` ` lambda=(4)/(5)` `k=(2 pi)/ lambda=(10pi)/(4)=7.85` wave moves along positive X-direction

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