MHT CET 2026 Physics question
The fundamental frequency of sonometer wire is 50 Hz for some length and tension. If the length is increased by 25% by keeping the tension same, then the frequency change of second harmonic is
Answer: (B)
Solution
For a vibrating string of length , tension and linear density , the -th harmonic is , so at fixed tension . The second harmonic initially is Hz. After the length becomes , the frequency
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