MHT CET · Physics · Waves and Sound
The speed of a wave in a certain medium is \(960 \mathrm{~m} / \mathrm{s}\). If 900 waves pass over a certain point of the medium in half a minute, the wavelength of the wave is
- A \(16 \mathrm{~m}\)
- B \(32 \mathrm{~m}\)
- C \(9 \mathrm{~m}\)
- D \(18 \mathrm{~m}\)
Answer & Solution
Correct Answer
(B) \(32 \mathrm{~m}\)
Step-by-step Solution
Detailed explanation
\(v=960 \mathrm{~m} / \mathrm{s} \quad \lambda=?\)
900 waves passes in \(30 \mathrm{sec}\).
\(\therefore \quad 30\) waves passes in \(1 \mathrm{sec}\)
\(\therefore v=30\)
\(\therefore \lambda=\frac{v}{v}=\frac{960}{30}=32 \mathrm{~m}\)
900 waves passes in \(30 \mathrm{sec}\).
\(\therefore \quad 30\) waves passes in \(1 \mathrm{sec}\)
\(\therefore v=30\)
\(\therefore \lambda=\frac{v}{v}=\frac{960}{30}=32 \mathrm{~m}\)
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