An engine is moving on a circular track with a constant speed. It is blowing a whistle of frequency `500 Hz`. The frequency received by an observer standing stationary at the centre of the track is

An engine is moving on a circular path of radius 100 m with a speed of 20 m/s. What will be frequency noted by an observer standing stationary at the centre of the circular path when the engine blows a whistle of frequency 500 Hz ?

An engine is moving on a circular path of radius 200 m with a speed of 15 m/s. What will be the frequency observed by an observer standing at rest, at the centre of the circular path, when the engine blows a whistle of frequency 250 Hz?

A train is moving on a straight track with speed 20 ms^(-1). It is blowing whistle at the frequency of 1000 Hz. The percentage change in the frequency heard by a person standing near the track as the train passes him is close to (speed of sound = 320 ms^(-1)).

A train is moving on a straight track with speed 20 ms^(-1) . It is blowing its whistle at the frequency of 1000 Hz. The percentage change in the frequency heard by a person standing near the track as the train passes him is (speed of sound = 320 ms^(-1) ) close to

A train is moving on a straight track with speed 20ms^(-1) . It is blowing its whistle at the frequency of 1000 Hz . The percentage change in the frequency heard by a person standing near the track as the train passes him is (speed of sound = 320 ms^(-1) ) close to :

A train is moving on a straight track with speed 20ms^(-1) . It is blowing its whistle at the frequency of 1000 Hz . The percentage change in the frequency heard by a person standing near the track as the train passes him is (speed of sound = 320 ms^(-1) ) close to :

A train is moving on a straight track with speed 20ms^(-1) . It is blowing its whistle at the frequency of 1000 Hz . The percentage change in the frequency heard by a person standing near the track as the train passes him is (speed of sound = 320 ms^(-1) ) close to :