# 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
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The time of reverberation of a room $$A$$ is one second. What will be the time (in seconds) of reverberation of a room, having all the dimensions double those of room A?

1. 2

2. 4

3. $\frac{1}{2}$

4. 1

Subtopic:  Speed of Sound |
AIPMT - 2006
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

A transverse wave propagating along the $$x\text-$$axis is represented by:
$$y(x,t)=8.0\sin\left(0.5\pi x-4\pi t-\frac{\pi}{4}\right)$$, where $$x$$ is in meters and $$t$$ in seconds. The speed of the wave is:
1. $$4\pi$$ m/s
2. $$0.5$$ m/s
3. $$\frac{\pi}{4}$$ m/s
4. $$8$$ m/s

Subtopic:  Wave Motion |
83%
From NCERT
AIPMT - 2006
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Two sound waves with wavelengths $$5.0~\text{m}$$ and $$5.5~\text{m}$$, respectively, propagate in gas with a velocity of $$330~\text{m/s}$$. How many beats per second can we expect?
1. $$12$$
2. $$0$$
3. $$1$$
4. $$6$$

Subtopic:  Beats |
75%
From NCERT
AIPMT - 2006
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The wave described by $$y=0.25\sin (10\pi x-2\pi t)$$, where $$x$$ and $$y$$ are in metre and $$t$$ in second, is a wave travelling along the:

 1 –ve x-direction with frequency $$1$$ Hz 2 +ve x-direction with frequency $$\pi$$ Hz and wavelength  $$\lambda=0.2$$ m 3 +ve x-direction with frequency $$1$$ Hz and wavelength  $$\lambda=0.2$$ m 4 –ve x-direction with amplitude $$0.25$$ m and wavelength  $$\lambda=0.2$$ m

Subtopic:  Wave Motion |
84%
From NCERT
AIPMT - 2008
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Each of the two strings of lengths $$51.6~\text{cm}$$ and $$49.1~\text{cm}$$ is tensioned separately by $$20~\text{N}$$ of force. The mass per unit length of both strings is the same and equals $$1$$ g/m. When both the strings vibrate simultaneously, the number of beats is:
 1 $$5$$ 2 $$7$$ 3 $$8$$ 4 $$3$$
Subtopic:  Beats |
56%
From NCERT
AIPMT - 2009
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A wave in a string has an amplitude of $$2$$ cm. The wave travels in the positive direction of the $$x\text-$$axis with a speed of $$128~\text{m/s}$$ and it is noted that $$5$$ complete waves fit in the $$4$$ m length of the string. The equation describing the wave is:
1. $$y =(0.02~\text{m})\sin(7.85x+1005t)$$
2. $$y =(0.02~\text{m})\sin(15.7x-2010t)$$
3. $$y =(0.02~\text{m})\sin(15.7x+2010t)$$
4. $$y =(0.02~\text{m})\sin(7.85x-1005t)$$
Subtopic:  Wave Motion |
73%
From NCERT
AIPMT - 2009
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A tuning fork of frequency $$512$$ Hz makes $$4$$ beats/s with the vibrating string of a piano. The beat frequency decreases to $$2$$ beats/s when the tension in the piano string is slightly increased. The frequency of the piano string before increasing the tension was:
1. $$510$$ Hz
2. $$514$$ Hz
3. $$516$$ Hz
4. $$508$$ Hz

Subtopic:  Beats |
71%
From NCERT
AIPMT - 2010
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A transverse wave is represented by y = Asin(ωt -kx). At what value of the wavelength is the wave velocity equal to the maximum particle velocity?

1. $\pi$A/2

2. $\pi$A

3. 2$\pi$A

4. A

Subtopic:  Wave Motion |
84%
From NCERT
AIPMT - 2010
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Sound waves travel at $$350$$ m/s through warm air and at $$3500$$ m/s through brass. The wavelength of a $$700$$ Hz acoustic wave as it enters brass from warm air:
 1 increase by a factor of $$20$$. 2 increase by a factor of $$10$$. 3 decrease by a factor of $$20$$. 4 decrease by a factor of $$10$$.
Subtopic:  Speed of Sound |
77%
From NCERT
AIPMT - 2011
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints