JEE Main 2012 — Waves and Sound Question with Solution
JEE Main 2012 (12 May Online)
Question
A wave represented by the equation is superimposed with another wave to form a stationary wave such that the point is node. The equation for the other wave is
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
Since the point is a node and reflection is taking place from point . This means that reflection must be taking place from the fixed end and hence the reflected ray must suffer an additional phase change of or a path change of .
So, if
Hence equation for the other wave
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This is a previous-year question from JEE Main 2012, covering the Waves and Sound chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.