CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Sound Wave:Displacement Equation

A car approac...

Question

A car approaching a crossing at a speed of $20 m / s$ sounds a horn of frequency $500 H z$ when $80 m$ from the crossing. Speed of sound in air is $330 m / s .$ What frequency is heard by an observer $60 m$ from the crossing on the straight road which crosses car road at right angles?

A

500 H z

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

326 H z

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

526 H z

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

D

426 H z

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C $526 H z$

Given, $v_{c} = 20 m sec & f = 500 H z$
We have to find the apparent frequency.

The situation in the question is as given in the diagram.

Suggest Corrections

thumbs-up

0

Similar questions

Q. A car approaching a crossing at a speed of 20 m/s sounds a horn of frequency 628 Hz when 80m from the crossing. The apparent frequency heard by an observer 60m from the crossing on the straight road which crosses the road at right angles is (velocity of sound = 330 m/s)

Q. A car approaching a crossing at a speed of

50 m/s

blows a horn of frequency

500 Hz

30 m

away from the crossing. The speed of sound in air is

330 m/s

. What frequency will be heard by an observer at rest at

40 m

from the crossing?

Q. A car approaching a crossing at a speed of

50 m/s

blows a horn of frequency

500 Hz

30 m

away from the crossing. The speed of sound in air is

330 m/s

. What frequency will be heard by an observer at rest at

40 m

from the crossing?

Q. A train approaching a crossing

X

40 m/s

sounds a horn of frequency

620 Hz

, when it is at a distance of

30 m

from the crossing. Speed of sound in air is

334 m/s

. What is the frequency heard by an observer (at rest) who is at a perpendicular distance of

40 m

from the crossing on the straight road.

[Assume, medium is stationary]

Q. A train approaching a railway crossing at a speed of

180 k m h^{- 1}

sounds a short whistle at a frequency

600 H z

400 m

away from the crossing. The speed of sound in air is

340 {m s}^{- 1}

. The frequency of the sound heard by a person standing on a road perpendicular to the track at a distance of

300 m

from the crossing is:

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

What Sound Really Is

PHYSICS

Watch in App

explore_more_icon

Explore more

Sound Wave:Displacement Equation

Standard XII Physics

Join BYJU'S Learning Program

CrossIcon