MereTeacher

JEE • NEET • FOUNDATION

JEE Previous Year Question

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.

Topic: JEE PYQ

Answer: B, D. Full step-by-step solution below.

  1. Aa high-pressure pulse starts traveling up the pipe, if the other end of the pipe is open.
  2. Ba low-pressure pulse starts traveling up the pipe, if the other end of the pipe is open.
  3. Ca low-pressure pulse starts traveling up the pipe, if the other end of the pipe is closed.
  4. Da high-pressure pulse starts traveling up the pipe, if the other end of the pipe is closed.

Correct answer: B, D

Solution

(b, d)
At open end phase of pressure wave charge by π so compression returns as rarefaction. While at closed end phase of pressure wave does not change so compression return as compression.

More Wave Motion & Waves on String PYQs