Two loudspeakers, driven by a common oscillator and amplifier, are arranged as shown. The frequency of the oscillator is gradually increased from zero and the detector at D records a series of maxima

Question

Two loudspeakers, driven by a common oscillator and amplifier, are arranged as shown. The frequency of the oscillator is gradually increased from zero and the detector at D records a series of maxima and minima. If the speed of sound is $330$ m/s, what is the frequency in Hz at which a maxima is heard the first time?

Answer:

330

Solution:

$Δ x = 1$ m
$nλ = 1$
$f = \frac{c}{λ} = c \times n$
$n = 1$
$f = 330$ Hz

TestHub · Accepted Answer

Δ x = 1 m nλ = 1 f = λ c ​ = c × n n = 1 f = 330 Hz

Physics - Sound Wave Question with Solution | TestHub

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