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NEET 1992 (AIPMT) · Progressive Wave Equation

Progressive Wave Equation question from NEET 1992 (AIPMT)

Q107NEET 1992 · AIPMTEasy

Progressive Wave Equation

The frequency of sinusodial wave y=0.40cos⁡[2000t+0.80]y = 0.40\cos[2000t + 0.80] would be

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Answer: (d)

  1. ω=2000 rad/s\omega = 2000\text{ rad/s}
  2. f=ω2π=20002π=1000π Hzf = \dfrac{\omega}{2\pi} = \dfrac{2000}{2\pi} = \dfrac{1000}{\pi}\text{ Hz}
  3. So the answer is (d) 1000π Hz\dfrac{1000}{\pi}\text{ Hz}.
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