Waves - Result Question 22

22. From a wave equation: y=0.5sin2π3.2(64tx), the frequency of the wave is

[1995]

(a) 5Hz

(b) 15Hz

(c) 20Hz

(d) 25Hz

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Answer:

Correct Answer: 22. (c)

Solution:

  1. (c) Given, y=0.5sin2π3.2(64tx)

Standard equation of the wave is :

y=asin2πλ(vtx)

Comparing the given equation with the standard equation, we get v=64 and λ=3.2. Therefore, frequency =643.2=20Hz.



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