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

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प्रश्न

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

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उत्तर

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

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Doppler Effect
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पाठ 11: Waves - Evaluation [पृष्ठ २७९]

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सामाचीर कलवी Physics - Volume 1 and 2 [English] Class 11 TN Board
पाठ 11 Waves
Evaluation | Q V. 3. | पृष्ठ २७९

संबंधित प्रश्‍न

The change in frequency due to Doppler effect does not depend on


Answer briefly.

What is Doppler effect?


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.


What is meant by the Doppler effect?


Consider a mixture of 2 mol of helium and 4 mol of oxygen. Compute the speed of sound in this gas mixture at 300 K.


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)


With what velocity an observer should move relative to a stationary source so that a sound of double the frequency of source is heard by an observer?


A source and a detector move away from each other in absence of wind with a speed of 20 m/s with respect to the ground. If the detector detects a frequency of 1800 Hz of the sound coming from the source, then the original frequency of the source considering the speed of sound in air 340 m/s will be ______ Hz.


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.


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