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COMEDK2021PhysicsWaves and Sound

The displacement of a wave is given by y=20 ( t+4 z) . The amplitude of the given wave is

Options

  1. A10
  2. B20
  3. C20 2
  4. D10 2

Correct answer

B. 20

Step-by-step solution

The general equation of a traveling wave is given by y = A (kx t + ) or y = A ( t kz + ) , where A represents the amplitude of the wave. Comparing the given equation y = 20 ( t + 4z) with the standard form y = A ( t + kz) , we identify the coefficient of the cosine function as the amplitude. Thus, the amplitude A = 20 . Answer: 20

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