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MHT CET · Physics · Waves and Sound

A string is vibrating in its fifth overtone between two rigid supports \(2.4 \mathrm{~m}\) apart. The distance between successive node and antinode is

  1. A \(0.8 \mathrm{~m}\)
  2. B \(0.2 \mathrm{~m}\)
  3. C \(0.1 \mathrm{~m}\)
  4. D \(0.6 \mathrm{~m}\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(0.2 \mathrm{~m}\)

Step-by-step Solution

Detailed explanation

The correct option is (B).
If the string is clamped between two supports separated by L.
For the fundamental overtone separation between successive nodes is \(\mathrm{L}\).
For the first overtone separation between successive nodes is \(\frac{L}{2}\).
For the second overtone the separation between successive nodes will be \(\frac{L}{3}\).
So, for nth overtone the separation between successive nodes will be \(\frac{\mathrm{L}}{(\mathrm{n}+1)}\).
Therefore, for the fifth over separation between successive nodes will be \(\frac{\mathrm{L}}{6}\).
In the separation between successive node and antinode is half of the separation between two successive nodes.
So, \(\frac{\mathrm{L}}{12}=\frac{2.4 \mathrm{~m}}{12}=0.2 \mathrm{~m}\)