English
Tamil Nadu Board of Secondary EducationHSC Science Class 11

A sound source and listener are both stationary and a strong wind is blowing. Is there a Doppler effect? - Physics

Advertisements
Advertisements

Question

A sound source and listener are both stationary and a strong wind is blowing. Is there a Doppler effect?

Short/Brief Note
Advertisements

Solution

When both source and listener are stationary, there is no relative motion between the source and the observer. Hence there is no Doppler effect.

shaalaa.com
Doppler Effect
  Is there an error in this question or solution?
Chapter 11: Waves - Evaluation [Page 279]

APPEARS IN

Samacheer Kalvi Physics - Volume 1 and 2 [English] Class 11 TN Board
Chapter 11 Waves
Evaluation | Q V. 3. | Page 279

RELATED QUESTIONS

The engine of a train sounds a whistle at frequency v. The frequency heard by a passenger is


Answer briefly.

State the expression for apparent frequency when source of sound and listener are

  1. moving towards each other
  2. moving away from each other

Solve the following problem.

A police car travels towards a stationary observer at a speed of 15 m/s. The siren on the car emits a sound of frequency 250 Hz. Calculate the recorded frequency. The speed of sound is 340 m/s.


The sound emitted from the siren of an ambulance has a frequency of 1500 Hz. The speed of sound is 340 m/s. Calculate the difference in frequencies heard by a stationary observer if the ambulance initially travels towards and then away from the observer at a speed of 30 m/s.


The difference between the apparent frequency of a source of sound as perceived by the observer during its approach and recession is 2% of the frequency of the source. If the speed of sound in air is 300 ms-1, then the velocity of the source is ______.


A railway engine whistling at a constant frequency moves with a constant speed aixi it goes past a stationary observer standing beside the railway track. Then the frequency of (n') of the sound heard by the observer with respect to time (t) can be best represented by which of the following curve?


A source of sound is moving with constant velocity of 30 mis emitting a note of frequency 256 Hz. The ratio of frequencies observed by a stationary observer while the source is approaching him and after it crosses him is ______. (speed of sound in air = 330 m/s)


When a sound source of frequency n is approaching a stationary observer with velocity u than the apparent change in frequency is Δn1 and when the same source is receding with velocity u from the stationary observer than the apparent change in frequency is Δn2. Then ______.


When an engine passes near to a stationary observer then its apparent frequencies occurs in the ratio 5/3. If the velocity of engine is ______.


The frequency of echo will be ______ Hz if the train blowing a whistle of frequency 320 Hz is moving with a velocity of 36 km/h towards a hill from which an echo is heard by the train driver. The velocity of sound in air is 330 m/s.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×