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Q. No.
If the initial tension on a stretched string is doubled, then the ratio of the initial and final speeds of a transverse wave along the string is:
1. \(1:2\)
2. \(1:1\)
3. \(\sqrt{2}:1\)
4. \(1:\sqrt{2}\)
Subtopic: Travelling Wave on String |
69%
From NCERT
NEET - 2022
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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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A sinusoidal waveform is travelling along the \(x \)-axis. The phase difference between two particles separated by \(10\) cm is \(\frac\pi{2}{}.\) The wavelength of the wave is:
1. \(20\) cm
2. \(30\) cm
3. \(40\) cm
4. \(80\) cm
1. \(20\) cm
2. \(30\) cm
3. \(40\) cm
4. \(80\) cm
Subtopic: Wave Motion |
89%
From NCERT
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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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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh
A waveform given by: \(y=3A\sin(\omega t-kx)\)
is superposed with another waveform \(y=4A\cos(\omega t-kx).\) The amplitude of the resulting waveform will be:
1. \(7A\)
2. \(A\)
3. \(3.5A\)
4. \(5A\)
is superposed with another waveform \(y=4A\cos(\omega t-kx).\) The amplitude of the resulting waveform will be:
1. \(7A\)
2. \(A\)
3. \(3.5A\)
4. \(5A\)
Subtopic: Wave Motion |
85%
From NCERT
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The equation of vibration of a taut string, fixed at both ends, is given by:
\(y=(4~\text{mm})~\cos\Big(\frac{\pi x}{30~\text{cm}}\Big)~\sin\Big(400\pi~ \text{s}^{-1}t\Big) \)
The speed of waves on the string is:
1. \(30\) m/s
2. \(60\) m/s
3. \(90\) m/s
4. \(120\) m/s
\(y=(4~\text{mm})~\cos\Big(\frac{\pi x}{30~\text{cm}}\Big)~\sin\Big(400\pi~ \text{s}^{-1}t\Big) \)
The speed of waves on the string is:
1. \(30\) m/s
2. \(60\) m/s
3. \(90\) m/s
4. \(120\) m/s
Subtopic: Standing Waves |
86%
From NCERT
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The first overtone of a closed pipe has a frequency \(f_c.\) A frequency that is \(2f_c\) can be excited from an open pipe of the same length but vibrating in its:
| 1. | \(2^{\text{nd}}\) harmonic | 2. | \(3^{\text{rd}}\) harmonic |
| 3. | \(6^{\text{th}}\) harmonic | 4. | \(12^{\text{th}}\) harmonic |
Subtopic: Standing Waves |
65%
From NCERT
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A string fixed at both ends is under tension \(T.\) It has a length \(L,\) and mass \(m.\) The fundamental frequency of the vibration is:
| 1. | \({ 1 \over 2L} \sqrt {T\over m}~~~~~~~~~~~~~~\) | 2. | \(\frac{1}{4 L} \sqrt{\frac{T}{m}}~~~~~~~~~~~~~~\) |
| 3. | \(\frac{1}{2} \sqrt{\frac{TL}{2m}}\) | 4. | \(\frac{1}{2} \sqrt{\frac{T}{m L}}\) |
Subtopic: Travelling Wave on String |
56%
From NCERT
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The fundamental frequencies of a closed pipe and an open pipe are identical. The first overtone for the closed pipe is \(f_c\) and for the open pipe is \(f_o.\) Their ratio \(\frac{f_c}{f_o}\) is:
| 1. | \(1\) | 2. | \(\dfrac12\) |
| 3. | \(\dfrac23\) | 4. | \(\dfrac32\) |
Subtopic: Standing Waves |
68%
From NCERT
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Sinusoidal sound waves of the same frequency travelling in air along the \(x\)-axis and the \(y\)-axis arrive in phase with each other at the origin. Their amplitudes are equal to \(A\) (each). The amplitude of the vibration at the origin is:
1. \(A\)
2. \(\sqrt 2A\)
3. \(2A\)
4. \((2+\sqrt2)A\)
1. \(A\)
2. \(\sqrt 2A\)
3. \(2A\)
4. \((2+\sqrt2)A\)
Subtopic: Wave Motion |
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