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MHT CET 2026 (18 Apr, Shift 2) · Stationary Waves & Vibrating Strings

Stationary Waves & Vibrating Strings question from MHT CET 2026 (18 Apr, Shift 2)

Q16MHT CET 2026 · 18 APR · SHIFT 2Medium

Stationary Waves & Vibrating Strings

A wire of length 'L' and linear density 'm' is stretched between two rigid supports with tension 'T'. It is observed that wire resonates in the PthP^{th} harmonic at a frequency of 320 Hz and resonates again at next higher frequency of 400 Hz in two successive modes. The value of 'P' is

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Answer: (b)

  1. For a string fixed at both ends, np=p n1n_p = p\,n_1, so two successive harmonics differ by n1n_1.
  2. n1=400−320=80 Hzn_1 = 400 - 320 = 80\text{ Hz}
  3. p=32080=4p = \dfrac{320}{80} = 4
  4. So the answer is (b) 44.
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