Exams › NEET › Physics

As the source is not moving towards or away from the observer in a straight line, so the Doppler's effect will not be observed by the observer.

1. If source and observer both are relatively at rest and if speed of sound is increased then frequency heard by observer will not change.
2. If source and observer both are relatively at rest and if speed of sound is increased then frequency heard by observer will change.
3. If source and observer both are moving towards each other then frequency heard by observer will increase.
4. If source and observer both are moving away from each other then frequency heard by observer will decrease.

Correct answer: If source and observer both are relatively at rest and if speed of sound is increased then frequency heard by observer will not change.

Solution

When the source and observer are relatively at rest, there is no relative motion between them, so the Doppler effect does not occur. Changing the speed of sound does not affect the frequency heard by the observer in this case.

Related NEET Physics questions

• In stationary waves, nodes are the points where there is:
• How does the sound produced by a vibrating object in a medium reach your ear?
• is the distance between consecutive corresponding points of the same phase, such as crests, troughs, compressions, rarefactions or zero crossings and is a characteristic of both travelling waves and standing waves, as well as other spatial wave patterns.
• An echo is simply a........of sound.
• The condition for constructive interference is path difference should be equal to :
• In a stationary wave:

⚔️ Practice NEET Physics free + battle 1v1 →