Home
Class 11
PHYSICS
The distribution of the sound intensity ...

The distribution of the sound intensity of the whistle as observed by the passengers in train A is best represented by

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
A
Intensity of sound vary only at approach and receding
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

Two trains A and B are approaching each other with 108 km h^(-1) and 126 km h^(-1) , respectively . If the train A sounds a whistle of frequency 500 Hz , find the frequency of the whistle as heard by a passenger in the train B . (a) before the trains cross each other and (b) after the trains cross each other . (Take velocity of sound as 330 m s^(-1) )

Two trains are moving towards each other at speeds of 72kmh^-1 and 54 kmh^-1 relative to the ground. The first train sounds a whistle of frequency 600 Hz. Find the frequency of the whistle as heard by a passenger in the second train a. before the trains meet and b. after teh trains have crossed each other. The speed of sound in air is 340 ms^-1

Two trains are moving towards each other on parallel tracks at speeds of 144kmph and 54kmph . The first train sounds a whistle of frequency 600Hz . Frequency of the whistle as heard by a passenger in the second train is ( V=340m//s )

Passenger of a train just drops a stone from it. The train was moving with constant velocity. What is path of the stone as observed by (a) the passenger itself, (b) a man standing on ground?

An engine giving whistle is moving towards a stationary observer with 110m//s speed. What will be the ratio of the frequency of the whistle heard when the engine is approaching and receding from the observer (the speed of sound is 330 m//s ) ?

Two trains A and B are moving with speeds 20 m//s respectively in the same direction on the same stright track, with B ahead of A . The engines are at the front ends. The engines of train A blows a long whistle. Assume that the sound of the whistle is composed of components varying in frequency from f_(1) = 800 Hz to f_(2) = 1120 Hz , asz shown in figure. The spread in the frequency (highest frequency - lowest frequency) is thus 320 Hz . The speed of sound in still air is 340 m//s . The spred of frequency as observed by the passengers in train B is

Two trains are moving towards each other at speeds of 20 m/s and 15 m/s relative to the ground. The first train sounds a whistle of frequency 600 Hz . the frequency of the whistle heard by a passenger in the second train before the train meets is (the speed of sound in air is 340 m/s )

A toy train in a children amusement park runs on an elliptical orbit having major and minor axis in the ratio of 4 : 3 . The length of the train is exactly equal to half the perimeter of the elliptical track. The train is travelling at a constant speed of 20 ms^( –1) . The engine sounds a whistle when its acceleration is minimum. The whistle has a frequency of f_(0) = 3460 Hz and speed of sound in air is V = 330 ms^( –1) (a) What frequency of whistle is received by a passenger in the last compartment of the train? (b) What frequency of whistle is received by a passenger sitting in the central compartment of the train?

A train blowing its whistle moves with a constant velocity v away from an observer on the ground. The ratio of the natural frequency of the whistle to that measured by the observer is found to be 1.2 . If the train is not rest and the observer moves away from it at the same velocity, this ratio would be given by