MCQ
What is the phase difference between the displacement wave and pressure wave in sound wave?
- AZero
- ✓$\frac{\pi}{2}$
- C$\pi$
- D$\frac{\pi}{4}$
Phase difference between the pressure and displacement wave will always be $\frac{\pi}{2}$.
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$(A)$ Temperature of gas is made $4$ times and pressure $2$ times |
$(P)$ Speed becomes $2\sqrt 2$ times |
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$(B)$ Only pressure is made $4$ times without change in temperature |
$(Q)$ Speed become $2$ times |
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$(C)$ Only temperature is changed to $4$ times |
$(R)$ Speed remains unchanged |
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$(D)$ Molecular mass of the gas is made $4$ times |
$(S)$ Speed becomes half |