MHT CET · Physics · Waves and Sound
The fundamental frequency of a sonometer wire is 50 Hz for some length and tension. If the length is increased by \(25 \%\) by keeping tension same then frequency change of second harmonic is
- A increased by 20%
- B decreased by \(20 \%\)
- C increased by 10%
- D decreased by 10%
Answer & Solution
Correct Answer
(B) decreased by \(20 \%\)
Step-by-step Solution
Detailed explanation
\( f_1 = 50 \) Hz \( L' = L + 0.25L = 1.25L \)
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