CameraIcon

SearchIcon

MyQuestionIcon

1

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

Apparent Frequency:Listener Moving

Two trains ar...

Question

Two trains are travelling towards each other both at a speed of 90 km $h^{- 1}$ . If one of the trains sounds a whistle at 500 Hz, what will be the apparent frequency heard in the other train ? Speed of sound in air = $350 m s^{- 1}$ .

Open in App

Solution

According to the given data,

$V_{s}$ =90 kh/hour =25 m/sec

$V_{0} = 25$ m/sec

So, Apparent frequency heard by the observer in train B

$= (\frac{350 + 25}{350 - 25}) \times 500 = 577 H z$

Suggest Corrections

thumbs-up

0

Similar questions

Q. Two trains are approaching each other on parallel tracks with same velocity. The whistle sound produced by one train is heard by a passenger in another train. If actual frequency of whistle is 620Hz and apparent increase in its frequency is 100Hz, the velocity of one of the two trains is (Velocity of sound in air

= 335 m s^{- 1}

)

Q. Two trains, each moving with a velocity of

30 {m s}^{- 1}

, cross each other. One of the trains gives a whistle whose frequency is

600 H z

. If the speed of sound is

330 {m s}^{- 1}

, the apparent frequency for passengers sitting in the other train before crossing would be

Q. Two passenger trains moving with a speed of 108 km/hour cross each other. One of them blows a whistle whose frequency is 750 Hz. If sound speed is 330 m/s, then passengers sitting in the other train, after trains cross each other will hear sound whose frequency will be [MP PMT 1991]

Two passenger trains moving with a speed of 108 km/hour cross each other.

One of them blows a whistle whose frequency is 750 Hz. If sound speed is

330 m/s, then passengers sitting in the other train, after trains cross each

other will hear sound whose frequency will be

Q. Two trains move towards each other with the same speed. Speed of sound is

340 {ms}^{- 1}

. If the pitch of the tone of the whistle of one when heard on the other changes by

\frac{9}{8}

times, then the speed of each train is:

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Doppler's Effect

PHYSICS

Watch in App

explore_more_icon

Explore more

Apparent Frequency:Listener Moving

Standard XII Physics

Join BYJU'S Learning Program

CrossIcon