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Q. No.Water waves produced by a motor boat sailing in water are:
1. neither longitudinal nor transverse.
2. both longitudinal and transverse.
3. only longitudinal.
4. only transverse.
1. neither longitudinal nor transverse.
2. both longitudinal and transverse.
3. only longitudinal.
4. only transverse.
Subtopic: Types of Waves |
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Sound waves of wavelength \(\lambda\) travelling in a medium with a speed of \(v\) m/s enter into another medium where its speed is \(2v\) m/s. Wavelength of sound waves in the second medium is:
1. \(\lambda \)
2. \(\dfrac{\lambda}{2} \)
3. \(2 \lambda \)
4. \(4 \lambda\)
1. \(\lambda \)
2. \(\dfrac{\lambda}{2} \)
3. \(2 \lambda \)
4. \(4 \lambda\)
Subtopic: Speed of Sound |
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Speed of sound wave in air
1. is independent of temperature.
2. increases with pressure.
3. increases with increase in humidity.
4. decreases with increase in humidity
1. is independent of temperature.
2. increases with pressure.
3. increases with increase in humidity.
4. decreases with increase in humidity
Subtopic: Speed of Sound |
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Change in temperature of the medium changes
1. frequency of sound waves.
2. amplitude of sound waves.
3. wavelength of sound waves.
4. loudness of sound waves.
1. frequency of sound waves.
2. amplitude of sound waves.
3. wavelength of sound waves.
4. loudness of sound waves.
Subtopic: Speed of Sound |
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With the propagation of longitudinal waves through a medium, the quantity transmitted is:
| 1. | matter | 2. | energy |
| 3. | energy and matter | 4. | energy, matter, and momentum |
Subtopic: Types of Waves |
53%
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Which of the following statements are true for wave motion?
| 1. | Mechanical transverse waves can propagate through all mediums. |
| 2. | Longitudinal waves can propagate through solids only. |
| 3. | Mechanical transverse waves can propagate through solids only. |
| 4. | Longitudinal waves can propagate through vacuum. |
Subtopic: Types of Waves |
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A sound wave is passing through an air column in the form of compression and rarefaction. In consecutive compressions and rarefactions;
1. density remains constant.
2. Boyle’s law is obeyed.
3. the bulk modulus of air oscillates.
4. there is no transfer of heat.
1. density remains constant.
2. Boyle’s law is obeyed.
3. the bulk modulus of air oscillates.
4. there is no transfer of heat.
Subtopic: Wave Motion |
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The equation of a plane progressive wave is given by \(y=0.6 \sin 2 \pi\left(t-\dfrac{x}{2}\right)\). On reflection from a denser medium, its amplitude becomes \(\frac{2}{3}\) of the amplitude of the incident wave. The equation of the reflected wave is:
| 1. | \(y=0.6 \sin 2 \pi\left(t+\dfrac{x}{2}\right)\) | 2. | \(y=-0.4 \sin 2 \pi\left(t+\dfrac{x}{2}\right) \) |
| 3. | \(y=0.4 \sin 2 \pi\left(t+\dfrac{x}{2}\right) \) | 4. | \(y=-0.4 \sin 2 \pi\left(t-\dfrac{x}{2}\right)\) |
Subtopic: Wave Motion |
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A string of mass \(2.5~\text{kg}\) is under a tension of \(200~\text N.\) The length of the stretched string is \(20.0~\text m.\) If the transverse jerk is struck at one end of the string, the disturbance will reach the other end in:
| 1. | \(1\) second |
| 2. | \(0.5\) second |
| 3. | \(2\) seconds |
| 4. | The data given is insufficient |
Subtopic: Travelling Wave on String |
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A train whistling at constant frequency is moving towards a station at a constant speed V. The train goes past a stationary observer on the station. The frequency n′ of the sound as heard by the observer is plotted as a function of time t (Fig 15.1) . Identify the expected curve.
| 1. |  |
2. |  |
| 3. |  |
4. |  |
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