Two identical loudspeakers are placed on a line at distance

Last updated: 6/8/2023

Two identical loudspeakers are placed on a line at distance 4 m and 6m from a microphone lying on the line joining them The output of each speaker at the microphone is 2 mW If the two speakers are connected in series and excited by the same oscillator and they vibrate in phase with each other the resultant output at the microphone will be frequency of oscillator 660 Hz and speed of sound 330 m s A zero B 2 mW C 4 mW D 8 mW