HARMONICS IN PIPES --IIT JEE, AIEEE, AIPMT Online Test

Find the fundamental frequency of a closed pipe, if the length of the air column is 42 m. (speed of sound in air = 332 m/s) ____.
2 Hz
4 Hz
7 Hz
9 Hz
If v is the speed of sound in air then the shortest length of the closed pipe which resonates to a frequency n ____.
The frequency of fundamental tone in an open organ pipe of length 0.48 m is 320 Hz. Speed of sound is 320 m/s. Frequency of fundamental tone in closed organ pipe is ____.
153.8 Hz
160.0 Hz
320.0 Hz
143.2 Hz
If fundamental frequency of closed pipe is 50 Hz then frequency of 2nd overtone is ____.
100 Hz
50 Hz
250 Hz
150 Hz
If the velocity of sound in air is 350 m/s. Then the fundamental frequency of an open organ pipe of length 50 cm is ____.
350 Hz
175 Hz
900 Hz
750 Hz
The fundamental note produced by a closed organ pipe is of frequency  The fundamental note produced by an open organ pipe of same length is of frequency ____.
An organ pipe  closed at one end vibrating in its first overtone and another pipe  open at both ends vibrating in its third overtone are in resonance with a given tuning fork. The ratio of lengths of  and  is ____.
1 : 2
1 : 3
3 : 8
3 : 4
A cylindrical tube, open at both ends, has a fundamental frequency  in air. The tube is dipped vertically into water such that half of its length is inside water. The fundamental frequency of the air column now is ____.
Two closed organ pipes, when sounded simultaneously gave 4 beats per sec. If longer pipe has a length of 1m. Then length of shorter pipe is, (v = 300 m/s) ____.
185.5 cm
94.9 cm
90 cm
80 cm
A closed organ pipe and an open organ pipe are tuned to the same fundamental frequency. What is the ratio of lengths?
1 : 2
2 : 1
2 : 3
4 : 3
Description:

N umerical examples on frequency of harmonics has been included in this test

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Kajal Sengupta
Physics 9th to 12 th grade,CIE, Edexcel, AP, IB , CBSE, ICSE
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