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:  Types of Waves |
81%
From NCERT
AIPMT - 2006
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Which of the following is a mechanical wave?
2. X-rays
3. Light waves
4. Sound waves

Subtopic:  Types of Waves |
88%
From NCERT
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Velocity of sound in air is $$332$$ m/s. Its velocity in the vacuum will be:
1. $$>332$$ m/s
2. $$=332$$ m/s
3. $$<332$$ m/s
4. meaningless

Subtopic:  Types of Waves |
63%
From NCERT
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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:  Types of Waves |
55%
From NCERT
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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:
1. $$7A$$
2. $$A$$
3. $$3.5A$$
4. $$5A$$
Subtopic:  Wave Motion |
84%
From NCERT
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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
Subtopic:  Wave Motion |
89%
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. $$(2+\sqrt2)A$$
Subtopic:  Wave Motion |
From NCERT
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Two waves are represented by the equations ${y}_{1}=a$ $\mathrm{sin}\left(\omega t+kx+0.57\right)$ $m$ and
${y}_{2}=a\mathrm{cos}\left(\omega t+kx\right)$ $m$, where $$x$$ is in metres 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

Subtopic:  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. $$1:\sqrt{2}$$
Subtopic:  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 $$v=\sqrt{\frac{tension}{mass/length}}$$.

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:  Travelling Wave on String |
71%
From NCERT