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Q. No.Which one of the following statements is true?
| 1. | Both light and sound waves in the air are transverse. |
| 2. | The sound waves in the air are longitudinal while the light waves are transverse. |
| 3. | Both light and sound waves in the air are longitudinal. |
| 4. | Both light and sound waves can travel in a vacuum. |
Subtopic: Â Types of Waves |
 81%
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AIPMT - 2006
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Which of the following is a mechanical wave?
| 1. | Radio waves | 2. | X-rays |
| 3. | Light waves | 4. | Sound waves |
Subtopic: Â Types of Waves |
 87%
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The velocity of sound in air is \(332~\text{m/s}.\) Its velocity in the vacuum will be:
| 1. | \(>332~\text{m/s}\) | 2. | \(=332~\text{m/s}\) |
| 3. | \(<332~\text{m/s}\) | 4. | meaningless |
Subtopic: Â Types of Waves |
 63%
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A wave moving in a gas:
| 1. | must be longitudinal | 2. | may be longitudinal |
| 3. | must be transverse | 4. | may be transverse |
Subtopic: Â Types of Waves |
 54%
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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:
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: Â Wave Motion |
 86%
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A sinusoidal waveform is travelling along the \(x \)-axis. The phase difference between two particles separated by \(10~\text{cm}\) is \(\frac\pi{2}{}.\) The wavelength of the wave is:
1. \(20~\text{cm}\)
2. \(30~\text{cm}\)
3. \(40~\text{cm}\)
4. \(80~\text{cm}\)
1. \(20~\text{cm}\)
2. \(30~\text{cm}\)
3. \(40~\text{cm}\)
4. \(80~\text{cm}\)
Subtopic: Â Wave Motion |
 88%
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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: Â Wave Motion |
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Two waves are represented by the equations \(y_1 = a\sin(\omega t+kx+0.57)~\text{m}\) and \(y_2 = a\cos(\omega t+kx)~\text{m},\) where \(x\) is in meters and \(t\) in seconds. The phase difference between them is:
1. \(1.25\) rad
2. \(1.57\) rad
3. \(0.57\) rad
4. \(1.0\) rad
1. \(1.25\) rad
2. \(1.57\) rad
3. \(0.57\) rad
4. \(1.0\) rad
Subtopic: Â Wave Motion |
 67%
From NCERT
AIPMT - 2011
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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. \(1:\sqrt{2}\)
1. \(1:2\)
2. \(1:1\)
3. \(\sqrt{2}:1\)
4. \(1:\sqrt{2}\)
Subtopic: Â Travelling Wave on String |
 69%
From NCERT
NEET - 2022
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A rope of uniform mass per unit length \(\mu\) is suspended from the ceiling, hanging under its own weight. If a small transverse pulse is formed at its lower end \(A\), it travels upward with a local speed \(v=\sqrt {\dfrac{\text{tension}}{\text{mass/length}}}\).
The speed of the pulse is:
The speed of the pulse is:
| 1. | maximum at \(A\), minimum at \(O\) |
| 2. | minimum at \(A\), maximum at \(O\) |
| 3. | uniform |
| 4. | minimum at \(A\) and \(O\), maximum in the middle |
Subtopic: Â Travelling Wave on String |
 71%
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