MHT CET · Physics · Waves and Sound
A stationary wave is formed having 4 nodes along the \(120 \mathrm{~cm}\) length of the string.
The wavelength of the wave is
- A \(20 \mathrm{~cm}\)
- B \(40 \mathrm{~cm}\)
- C \(80 \mathrm{~cm}\)
- D \(60 \mathrm{~cm}\)
Answer & Solution
Correct Answer
(C) \(80 \mathrm{~cm}\)
Step-by-step Solution
Detailed explanation
4 modes formed
\(\begin{aligned} \therefore 3 \lambda / 2 &=120 \mathrm{~cm} \\ \lambda &=\frac{240}{3} \mathrm{~cm} \end{aligned} \Rightarrow \lambda=80 \mathrm{~cm}\)
\(\begin{aligned} \therefore 3 \lambda / 2 &=120 \mathrm{~cm} \\ \lambda &=\frac{240}{3} \mathrm{~cm} \end{aligned} \Rightarrow \lambda=80 \mathrm{~cm}\)
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