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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

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

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

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