Question 250: Waves

Question

Two sound waves having frequencies 250 Hz and 256 Hz superimpose to produce beat wave. The resultant beat wave has intensity maximum at $\mathrm{t}=0$. After how much time an intensity will be minimum produced at the same point?

Accepted Answer

Beat frequency $=256-250=6 \mathrm{~Hz}$
Time between the maxima and minima of the beats is $\frac{T_{	ext {beats }}}{2}$.
$$\frac{T_{	ext {beats }}}{2}=\frac{1}{6 	imes 2}=\frac{1}{12} \mathrm{~s}$$

Answer

$\frac{1}{6} \mathrm{~s}$

Answer

$\frac{1}{24} \mathrm{~s}$

Answer

$\frac{1}{18} \mathrm{~s}$

Answer

$\frac{1}{12} \mathrm{~s}$

Waves

Two sound waves having frequencies 250 Hz and 256 Hz superimpose to produce beat wave. The resultant beat wave has intensity maximum at \mathrm{t}=0. After how much time an intensity will be minimum produced at the same point?

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