First slide

Stationary waves

Question

The first overtone of a stretched wire of given length is 320 Hz. The first harmonic is :

Moderate

A

320 Hz
B

160 Hz
C

480 Hz
D

640 Hz

Solution

Frequency of first overtone or second harmonic (n₂) = 320Hz. So, frequency of first harmonic
$n_{1} = \frac{n_{2}}{2} = \frac{320}{2} = 160 Hz$

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