A train has just complicated a U-curve in a track which is a semicircle. The engine is at the forward end of the semi-circular partof the track while the last carriage is at the rear end of the semicircular track.
The driver blowsa shistle of frequency $200 H z$ . Velocity of sound is $340 m / s$ . Then the apparent frequency as observed by a passenger in the middle of a train when the speed of the train is $30 m / s$ is

209 H z

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288 H z

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200 H z

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181 H z

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Solution

The correct option is C $200 H z$
The engine and motion of passenger at middle of train are perpendicular
=no change of frequency

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A train has just complicated a U-curve in a track which is a semicircle. 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 semicircular track. 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 a train when the speed of the train is 30 m/sec is

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

Q. A train has just completed a

U

-curve in a track which is semicircle. The engine is at the forward end of the semicircular part of the track while the last carriage is at the rear end of the semicircular track. The driver blows a whistle of frequency

200 H z

. Velocity of Sound is

340 m s^{- 1}

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

30 m s^{- 1}

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 train has just completed a U-curve in a track which is a semicircle. 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. Velocity of sound is 340 m/sec. Then the apparent frequency as observed by a passenger in the middle of a train when the speed of the train is 30 m/sec is

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The correct option is C 200HzThe engine and motion of passenger at middle of train are perpendicular=no change of frequency

The correct option is C $200 H z$
The engine and motion of passenger at middle of train are perpendicular
=no change of frequency