MHT CET 2026 Physics question

A sonometer wire is vibrating in third overtone. There are

(A)5 nodes and 4 antinodesCorrect
(B)4 nodes and 5 antinodes
(C)4 nodes and 4 antinodes
(D)5 nodes and 5 antinodes

Answer: (A)

Solution

A sonometer wire is fixed at both ends, so both ends are nodes and it vibrates in loops in the -th harmonic. The fundamental (first harmonic) is the 1st harmonic, the first overtone is the 2nd harmonic, the second overtone is the 3rd harmonic and the third overtone is the 4th harmonic. For the 4th harmonic the

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Question ID VK-097655