Home
Class 12
PHYSICS
A train whistling at constant frequency ...

A train whistling at constant frequency is moving towards a station at a constant speed v. The train goes past a stationaary observer on the station. The frquency n of the sound as heard by the observer is poltted as a function of time t(figure ). Identify the expected curve.

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Similar Questions

Explore conceptually related problems

A train whistling at constant frequency is moving towards a station at a constant speed V. The train goes past a stationary observer on the station. The frequency n^(') of the sound as heard by the observer is plotted as a function of time t, figure. Identify the expected curve.

A train whistling at constant frequency is moving towards a station at a constant speed V. The train goes past a stationary observer on the station. The frequency n^(') of the sound as heard by the observer is plotted as a function of time t, figure. Identify the expected curve.

A train is moving towards a stationary observer. Which of the following curve best represents the frequency recived by observer f as a function of time?

A source of sound is travelling towards a stationary observer. The frequency of sound heard by the observer is 25% more that the actual frequency. If the speed of sound is v, that of the source is

a bus is moving towards and stationary observer with speed 20 m/s blows a horn of frequency 200 Hz. the frequency of sound heard by the observer is approximately ( take speed of sound 320 m/s)

A source of sound emitting a note of constant frequency is moving towards a stationary listener and then recedes from the listener with constant velocity maintained throughout the motion. The frequency heard by the listener (f). when plotted against time (t) will give the following curve(s).

A train is moving with a constant speed along a circular track. The engine of the train emits a sound of frequency f. The frequency heard by the guard at the rear end of the train.

A train standing at the outer signal of a railway station blows a whistle of frequency 400 Hz in still air. The train begins to move with a speed of 30 m s^(- 1) towards the platform. The frequency of the sound heard by an observer standing on the platform is (Speed of sound in air = 330 m s^(-1) )

A train of length l is moving with a constant speed upsilon along a circular track of radius R . The engine of the train emits a sound of frequency f . Find the frequency heard by a guard at the rear end of the train.

An observer starts moving with unifrom acceleration a towards a stationary sound soure of frequency f_(o) . As the observer approaches the source ,the apparent frequency f heard by the observer varies with time t as