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A person blows into open-end of a long pipe. As a result, a high pressure pulse of air travels down the pipe. When this pulse reaches the other end of the pipe, (A) a high-pressure pulse starts travelling up the pipe, if the other end of the pipe is open. (B) a low-pressure pulse starts travelling up the pipe, if the other end of the pipe is open. (C) a low-pressure pulse starts travelling up the pipe, if the other end of the pipe is closed. (D) a high-pressure pulse starts travelling up the pipe, if the other end of the pipe is closed

A person blows into open-end of a long pipe. As a result, a high pressure pulse of air travels down the pipe. When this pulse reaches the other end of the pipe,


(A) a high-pressure pulse starts travelling up the pipe, if the other end of the pipe is open.


(B) a low-pressure pulse starts travelling up the pipe, if the other end of the pipe is open.


(C) a low-pressure pulse starts travelling up the pipe, if the other end of the pipe is closed.


(D) a high-pressure pulse starts travelling up the pipe, if the other end of the pipe is closed

Grade:12

1 Answers

Abhishek
38 Points
10 years ago
(B,D) At open end,the phase of pressure wave changes by ^ radian due to reflection.At closed end there is no change in phase of a pressure wave due to reflection

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