JEE Main 2013 — Vector Algebra Question with Solution
JEE Main 2013 (09 Apr Online)
Question
Let and be three vectors. A vector of the type for some scalar , whose projection on is of magnitude is :
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
Let
If be the angle between and , then projection of or on
But projection of on
when , then
when , then
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This is a previous-year question from JEE Main 2013, covering the Vector Algebra chapter of Mathematics. 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.