JEE Main 2012 — Waves and Sound Question with Solution
JEE Main 2012 (12 May Online)
Question
This question has Statement 1 and Statement 2 . Of the four choices given after the Statements, choose the one that best describes the two Statements.
Statement 1: Bats emitting ultrasonic waves can detect the location of a prey by hearing the waves reflected from it.
Statement 2: When the source and the detector are moving, the frequency of reflected waves is changed.
Choose an option
Show full solutionCorrect option: C
Correct answer
CStatement 1 is true, Statement 2 is true, Statement 2 is not the correct explanation of Statement 1.
Step-by-step explanation
Bats catch the prey by hearing reflected ultrasonic waves.
When the source and the detector (observer) are moving, frequency of reflected waves change. This is according to Doppler's effect.
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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.