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JEE Main 2006 Physics question

PhysicsWavesJEE Main 2006

A string is stretched between fixed points separated by 75 cm. It is observed to have resonant frequencies of 420 Hz and 315 Hz. There are no other resonant frequencies between these two. Then, the lowest resonant frequency for this string is

Answer: (2)

Solution

For a string fixed at both ends, resonant frequencies are ; consecutive ones

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Question ID VK-038758