MCQ
Velocity of sound in air is
- AFaster in dry air than in moist air
- BDirectly proportional to pressure
- CDirectly proportional to temperature
- ✓Independent of pressure of air
✓
Answer
Correct option: D.
Independent of pressure of air
d
(d) $v = \sqrt {\frac{{\gamma \,P}}{\rho }} $; as $P$ changes, $\rho$ also changes.
(d) $v = \sqrt {\frac{{\gamma \,P}}{\rho }} $; as $P$ changes, $\rho$ also changes.
Hence $\frac{P}{\rho }$ remains constant so speed remains constant.
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