JEE Main 2020MathematicsCircleMediumMCQ

JEE Main 2020 — Circle Question with Solution

JEE Main 2020 (07 Jan Shift 2)

Question

Let the tangents drawn from the origin to the circle, x2+y2-8x-4y+16=0 touch it at the points A and B . Then AB2 is equal to

Choose an option

Show full solutionCorrect option: C
Correct answer
C645

Step-by-step explanation

L=S1=16=4
R=16+4-16=2
Length of chord of contact =2LRL2+R2=2×4×216+4=1620

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About this question

This is a previous-year question from JEE Main 2020, covering the Circle 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.