JEE Main & Advanced
Physics
Wave Mechanics
JEE PYQ-Wave Mechanics
question_answer
An observer moves towards a stationary source of sound, with a velocity one-fifth of the velocity of sound. What is the percentage increase in the apparent frequency? [AIEEE 2005]
A) Zero
B) 0.5%
C) 5%
D) 20%
Correct Answer:
D
Solution :
[d] Given,
When observer moves towards the stationary source, then