The ratio of frequencies of fundamental harmonic produced by an open pipe to that of closed pipe having the same length is:
 1 $$3:1$$ 2 $$1:2$$ 3 $$2:1$$ 4 $$1:3$$
Subtopic:  Standing Waves |
55%
From NCERT
NEET - 2023
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The $$4^\mathrm{th}$$ overtone of a closed organ pipe is the same as that of the $$3^\mathrm{rd}$$ overtone of an open pipe. The ratio of the length of the closed pipe to the length of the open pipe is:
 1 $$8:9$$ 2 $$9:7$$ 3 $$9:8$$ 4 $$7:9$$
Subtopic:  Standing Waves |
70%
From NCERT
NEET - 2023
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A string of length $$l$$ is fixed at both ends and is vibrating in second harmonic. The amplitude at antinode is $$2$$ mm. The amplitude of a particle at a distance $$l/8$$ from the fixed end is:

1. $$2\sqrt2~\text{mm}$$
2. $$4~\text{mm}$$
3. $$\sqrt2~\text{mm}$$
4. $$2\sqrt3~\text{mm}$$

Subtopic:  Standing Waves |
53%
From NCERT
NEET - 2022
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An organ pipe filled with a gas at $$27^\circ \text{C}$$ resonates at $$400$$ Hz in its fundamental mode. If it is filled with the same gas at $$90^\circ \text{C},$$ the resonance frequency at the same mode will be:
 1 $$420$$ Hz 2 $$440$$ Hz 3 $$484$$ Hz 4 $$512$$ Hz
Subtopic:  Standing Waves |
66%
From NCERT
NEET - 2022
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The length of the string of a musical instrument is $$90$$ cm and has a fundamental frequency of $$120$$ Hz. Where should it be pressed to produce a fundamental frequency of $$180$$ Hz?

 1 $$75$$ cm 2 $$60$$ cm 3 $$45$$ cm 4 $$80$$ cm
Subtopic:  Standing Waves |
82%
From NCERT
NEET - 2020
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The fundamental frequency in an open organ pipe is equal to the third harmonic of a closed organ pipe. If the length of the closed organ pipe is $$20~\text{cm}$$, the length of the open organ pipe is:
1. $$13.2~\text{cm}$$
2. $$8~\text{cm}$$
3. $$12.5~\text{cm}$$
4. $$16~\text{cm}$$

Subtopic:  Standing Waves |
62%
From NCERT
NEET - 2018
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The two nearest harmonics of a tube closed at one end and open at the other end are $$220$$ Hz and $$260$$ Hz. What is the fundamental frequency of the system?
1. $$20$$ Hz
2. $$30$$ Hz
3. $$40$$ Hz
4. $$10$$ Hz

Subtopic:  Standing Waves |
From NCERT
NEET - 2017
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The second overtone of an open organ pipe has the same frequency as the first overtone of a closed pipe $$L$$ meter long. The length of the open pipe will be:
1. $$L$$
2. $$2L$$
3. $$\frac{L}{2}$$
4. $$4L$$

Subtopic:  Standing Waves |
76%
From NCERT
NEET - 2016
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An air column, closed at one end and open at the other, resonates with a tuning fork when the smallest length of the column is $$50$$ cm. The next larger length of the column resonating with the same tuning fork will be:

 1 $$100$$ cm 2 $$150$$ cm 3 $$200$$ cm 4 $$66.7$$ cm
Subtopic:  Standing Waves |
79%
From NCERT
NEET - 2016
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A string is stretched between fixed points separated by $$75.0~\text{cm}$$. It is observed to have resonant frequencies of $$420~\text{Hz}$$ and $$315~\text{Hz}$$. There are no other resonant frequencies between these two. The lowest resonant frequency for this string is:
1. $$155 \mathrm{~Hz}$$
2. $$205 \mathrm{~Hz}$$
3. $$10.5 \mathrm{~Hz}$$
4. $$105 \mathrm{~Hz}$$

Subtopic:  Standing Waves |
78%
From NCERT
NEET - 2015
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