Two persons \( A \) and \( B \), each carrying a source of frequency \( 300 \mathrm{~Hz} \), are...

Channel:
PW Solutions
Subscribers:
443,000
Published on ● Video Link: https://www.youtube.com/watch?v=2WD1ZhDTDPI


Duration: 4:35
0 views
0

Two persons \( A \) and \( B \), each carrying a source of frequency \( 300 \mathrm{~Hz} \), are standing a few metre apart. \( A \) starts moving towards \( B \) with velocity \( 30 \mathrm{~m} / \mathrm{s} \). If the speed of sound is \( 300 \mathrm{~m} / \mathrm{s} \), which of the following is true?
(a) Number of beats heard by \( A \) is higher than that heard by \( B \)
(b) The number of beats heard by \( B \) are \( 30 \mathrm{~Hz} \)
(c) Both (a) and (b) are correct
(d) Both (a) and (b) are wrong
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live



Other Videos By PW Solutions


2023-01-18(a) In a liquid with density \( 1300 \mathrm{~kg} / \mathrm{m}^{3} \), longitudinal waves with f...
2023-01-18A gas is a mixture of two parts by volume of hydrogen and one part by volume of nitrogen at \( \...
2023-01-18A railroad train is travelling at \( 30 \mathrm{~m} / \mathrm{s} \) in still air. The frequency ...
2023-01-18A locomotive engine approaches a railway station and whistles at a frequency of \( 400 \mathrm{~...
2023-01-18Two sources of sound \( A \) and \( B \) produce the wave of \( 350 \mathrm{~Hz} \), in the same...
2023-01-18When an observer moves toward a stationary source with a certain velocity, he observers an appar...
2023-01-18First overtone frequency of a closed organ pipe is equal to the first overtone frequency of an o...
2023-01-18The figure shows a snap photograph of a vibrating string at \( t=0 \). The particle \( P \) is o...
2023-01-18A closed organ pipe and an open organ pipe of same length produce 2 beats when they are set into...
2023-01-18A glass tube of \( 1.0 \mathrm{~m} \) length is filled with water. The water can be drained out ...
2023-01-18Two persons \( A \) and \( B \), each carrying a source of frequency \( 300 \mathrm{~Hz} \), are...
2023-01-18144 बॉल पेनों के एक समूह में 20 बॉल पेन खराब हैं और शेष अच्छे हैं। आप वही पेन खरीदना चाहेंगे जो ...
2023-01-18A fixed source of sound emitting a certain frequency appears as \( f_{a} \) when the observer is...
2023-01-18A particle of specific charge \( \alpha \) is projected from origin at \( t=0 \) with a veloci...
2023-01-18For the wave equation, \( \quad y=(4 \mathrm{~cm}) \sin [\pi t+2 \pi x] \) \( P \) Here, \( t \)...
2023-01-18A tuning fork of frequency \( 340 \mathrm{~Hz} \) is sounded above an organ pipe of length \( 12...
2023-01-18One train is approaching an observer at rest and another train is receding from him with the sam...
2023-01-18A uniform rope with length \( L \) and mass \( m \) is held at one end and whirled in a horizont...
2023-01-18The wave speed \( (v) \) in a uniform freely hanging rope varies with the distance \( y \) from ...
2023-01-18A sound source emits frequency of \( 180 \mathrm{~Hz} \) when moving towards a rigid wall with s...
2023-01-18In a closed end pipe of length \( 105 \mathrm{~cm} \), standing waves are set up corresponding t...