Published by:
CGP EDU Academic Team
Published on: September 12, 2026
Two loudspeakers ( 
and 
) are placed with a separation of 10 m , as shown in figure. Both speakers are fed with an audio input signal of same frequency with constant volume. A voice recorder, initially at point 
, at equidistance to both loud speakers, is moved by 25 m along the line 
while monitoring the audio signal. The measured signal was found to undergo 10 cycles of minima and maxima during the movement. The frequency of the input signal is 
Hz (Speed of sound in air is 
and 
)
Text Solution
Verified by ExpertsThe correct answer is:
600
(600) Point B will 
maxima
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