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

Byju's Answer

Standard X

Physics

Doppler Effect

An engine is ...

Question

An engine is moving on a circular path of radius 100 metre with a speed of 20 metre per second. The frequency observed by an observer standing stationary at the centre of circular path when the engine blows a whistle of frequency 500 Hz is

more than 500 Hz

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

less than 500 Hz

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

500 Hz

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

no sound is heard

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

Open in App

Solution

The correct option is D 500 Hz
Here relative motion of engine is perpendicular to the observer, so, there is no doppler effect.
So, frequency of whistle reaching the observer will remain same.
So, observed frequency is $500 H z$ .

Suggest Corrections

Similar questions

Q. A train standing at a certain distance from a railway platform is blowing a whistle of frequency 500 Hz. If the speed of sound is

340 m s^{- 1}

, the frequency and wavelength of the sound of the whistle heard by a man running towards the engine with a speed of

10 m s^{- 1}

respectively are

Q. A train standing at a certain distance from a railway platform is blowing a whistle of frequency 500 Hz. If the speed of sound is

340 m s^{- 1}

, the frequency and wavelength of the sound of the whistle heard by a man running towards the engine with a speed of

10 m s^{- 1}

respectively are

Q. A train moving at a speed of

30 m/s

has just completed a U-curve in a semi-circular track. The engine is at the forward end of the semi-circular part of the track while the last carriage is at the rear end of the semi-circular track. The driver blows a whistle of frequency

200 Hz

. If the velocity of sound is

340 m/s

, then the apparent frequency as observed by a passenger in the middle of the train is

A train has arrived into a track which is a semicircle. At an instant when the engine is at the forward end of the semi circular part of the track while the last carriage is at the rear end, the driver blows a whistle of frequency 200 Hz. Velocity of sound is 340 m/sec. Then the apparent frequency as observed by a passenger in the middle of the train at the same instant is, (the speed of the train is 30 m/second)

Q. A source is moving with constant speed

v_{s} = 20 m / s

towards a stationary observer due east of the source. Wind is blowing at the speed of

20 m / s a t 60^{\circ}

north of east. The source has frequency 500 Hz. Speed of sound = 300 m/s. The frequency registered by the observer is approximately

Join BYJU'S Learning Program

An engine is moving on a circular path of radius 100 metre with a speed of 20 metre per second. The frequency observed by an observer standing stationary at the centre of circular path when the engine blows a whistle of frequency 500 Hz is

The correct option is D 500 HzHere relative motion of engine is perpendicular to the observer, so, there is no doppler effect. So, frequency of whistle reaching the observer will remain same.So, observed frequency is 500 Hz.

The correct option is D 500 Hz
Here relative motion of engine is perpendicular to the observer, so, there is no doppler effect.
So, frequency of whistle reaching the observer will remain same.
So, observed frequency is $500 H z$ .