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NEET 1998 (AIPMT) · Wave Basics & Properties of Sound

Wave Basics & Properties of Sound question from NEET 1998 (AIPMT)

Q40NEET 1998 · AIPMTEasy

Wave Basics & Properties of Sound

In a sinusoidal wave, the time required for a particular point, to move from maximum displacement to zero displacement is 0.170 s0.170\text{ s}. The frequency of the wave is

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Answer: (a)

  1. Going from maximum displacement to zero (mean position) takes a quarter period: T4=0.170\frac{T}{4} = 0.170 s.
  2. T=0.680T = 0.680 s
  3. n=1T=10.680≈1.47n = \frac{1}{T} = \frac{1}{0.680} \approx 1.47 Hz
  4. So the answer is (a) 1.471.47 Hz.
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