Wave has simple harmonic motion whose period is 4 ; sec while ano… - Vidyadip

MCQ

Wave has simple harmonic motion whose period is $4\; sec$ while another wave which also possesses simple harmonic motion has its period $3\; sec$. If both are combined, then the resultant wave will have the period equal to ....... $sec$

✓
$12$
B
$4$
C
$3$
D
$5$

✓

Answer

Correct option: A.

$12$

a
Beats are produced. Frequency of beats will be $\frac{1}{3}-\frac{1}{4}=\frac{1}{12}$ Hence time period $=12 s$

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