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Ellipse question

2005 · Shift 0 · Q107

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PYQ Library
JEE Main
Mathematics
Ellipse
2005 · Shift 0 · Q107

Ellipse question

2005 · Shift 0 · Q107

JEE MainMathematicsEllipseMCQ+4 / −1

An ellipse has

OB

as semi minor axis,

F

and

F

' its focii and theangle

FBF

' is a right angle. Then the eccentricity of the ellipse is :

A
${1 \over {\sqrt 2 }}$
B
${1 \over 2}$
C
${1 \over 4}$
D
${1 \over {\sqrt 3 }}$

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