Q. The focal distance of a point $P$ on the parabola $y^{2} = 12x,$ if the ordinate of $P$ is 6, is

A) 12
B) 6
C) 3
D) 9
Explanation

(b)
Given parabola is $y^{2} = 12\ x$
Here, $a = \ \ 3$
For point $P(x,y),\ y = 6\$
This point lie on the parabola
$\therefore\ \ \ (6)^{2} = 12x\ \Rightarrow x = 3$
Thus , focal distance of point $P$ is 6

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.

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