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Closed at one end and open at the other end resonates with sound wav 138 Hz and also 165 Hz but not with any wave of frequency intermediate between these two The frequency of the fundamental note is: a) 30 Hz b)15Hz c) 60hz d)7.5 hz |
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Answer» Correct option(b) 15 Hz Explanation: The multiple of fundamental frequency gives 135, 165 Hz Hence taking LEAST COMMON MULTIPLE OF 135, 165 135 = 5 × 3 × 3 × 3 165 = 5 × 3 × 11 SO 15 is least common HENCE 15 Hz is the fundamental frequency |
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