Q. No.
| Statement I: | Sound waves travelling from air into water, incident obliquely, bend towards the normal. |
| Statement II: | Sound waves travel more slowly in water than in air. |
| 1. | Statement I is incorrect and Statement II is correct. |
| 2. | Both Statement I and Statement II are correct. |
| 3. | Both Statement I and Statement II are incorrect. |
| 4. | Statement I is correct and Statement II is incorrect. |
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| 1. | the frequency increases, and wavelength decreases. |
| 2. | the frequency remains constant, but the wavelength decreases. |
| 3. | the frequency decreases, wavelength remains constant. |
| 4. | the frequency remains constant but the wavelength increases. |
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| 1. | changes with pressure and temperature |
| 2. | changes with pressure only |
| 3. | changes with temperature only |
| 4. | is unaffected by changes in pressure and temperature |
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| 1. | increases by \(2\%\) |
| 2. | increases by \(1\%\) |
| 3. | remains unchanged |
| 4. | decreases by \(1\%\) |
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| 1. | its internal energy |
| 2. | its internal energy per unit volume |
| 3. | its internal energy per unit mass |
| 4. | its internal energy per unit temperature |
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| 1. | Air | 2. | Hydrogen |
| 3. | Water | 4. | Steel |
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If the absolute temperature of a gas is increased by \(1\text{%},\) the speed of sound in the gas:
1. increases by \(\sqrt{1} \text{%}\)
2. decreases by \(\sqrt{1} \text{%}\)
3. increases by \(1\text{%}\)
4. increases by \(0.5\text{%}\)
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| 1. | increase by \(1\%\) | 2. | decrease by \(1\%\) |
| 3. | increase by \(0.5\%\) | 4. | decrease by \(0.5\%\) |
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| Statement I: | The speed of sound waves in a medium depends on the elastic modulus and the density of the medium. |
| Statement II: | The speed of sound in a gas is independent of its temperature. |
| 1. | Statement I is incorrect and Statement II is correct. |
| 2. | Both Statement I and Statement II are correct. |
| 3. | Both Statement I and Statement II are incorrect. |
| 4. | Statement I is correct and Statement II is incorrect. |
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| 1. | \(500~\text {m}\) | 2. | \(1~\text {km}\) |
| 3. | \(2~\text {km}\) | 4. | \(1.5~\text {km}\) |
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