Waves - Result Question 35

35. Equation of a progressive wave is given by y=4sin[π(t5x9)+π6] Then which of the following is correct? [1988]

(a) v=5cm

(b) λ=18cm

(c) a=0.04cm

(d) f=50Hz

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Answer:

Correct Answer: 35. (b)

Solution:

  1. (b) The standard equation of a progressive wave is

y=asin[2π(tTxλ)+ϕ]

The given equation can be written as

y=4sin[2π(t10x18)+π6]

a=4cm,T=10s,λ=18cm and ϕ=π/6

Hence, (b) is correct.



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