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KCET2011PhysicsWaves and Sound

The equation of a wave is given by y=10 ( 2 45 t+ ) . If the displacement is 5 ~cm at t=0 , then the total phase at t=7.5 ~s is

Options

  1. A3
  2. B2
  3. C6

Correct answer

B. 2

Step-by-step solution

y=10 [ 2 45 t+ ]y=5 ~cm at t=0 5=10( ) or = 1 2 or = 6 Again if t=7.5 ~s Then total phase = 2 45 15 2 + 6 = 3 + 6 = 2 + 6 = 3 6 = 2

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