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NEET2009PhysicsWaves and SoundActual

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 128 ~m / s and it is noted that 5 complete waves fit in 4 ~m length of the string. The equation describing the wave is

Options

  1. Ay=(0.02) m (7.58 x-1005 t)
  2. By=(0.02) m (7.85 x+1005 t )
  3. Cy=(0.02) m (15.7 x-2010 t)
  4. Dy=(0.02) m (15.7 x+2010 t)

Correct answer

A. y=(0.02) m (7.58 x-1005 t)

Step-by-step solution

5 =4 = 4 5 k = 2 = 10 4 =7.85 wave moves along positive X -direction

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