Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Search any question & find its solution
Question: Answered & Verified by Expert
A source of sound S emitting waves of frequency 100 Hz and an observer O are located at some distance from each other. The source is moving with a speed of 19.4 s-1 at an angle of 60o with the source observer line as shown in the figure. The observer is at rest. The apparent frequency observed by the observer corresponding to the wave emitted by the source at the instant shown is (velocity of sound in air 330 s-1 )

PhysicsWaves and SoundJEE Main
Options:
  • A 103Hz
  • B 106Hz
  • C 97Hz
  • D 100Hz
Solution:
1102 Upvotes Verified Answer
The correct answer is: 103Hz


f=f0v-v0v-vs

f=100v-0v-+9.7

f=100vv1-9.7v

f=1001+9.7330=103 Hz

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.