Home Maths Conic Sections Ellipse The locus of the foot of the perpendicular d…
Maths Conic Sections Ellipse Single Correct MCQ
Published on: August 14, 2026

The locus of the foot of the perpendicular drawn from the centre to any tangent to the ellipse x 2 /a 2 + y 2 /b 2 = 1 is -

A
A circle
B
An ellipse
C
A hyperbola
D
None of these

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Text Solution

Verified by Experts
The correct answer is:
D

Equation of any tangent to the ellipse is

y = mx + … (1)

Equation of the line through the centre (0, 0) perpendicular to (1) is

y = (–1/m) x … (2)

Eliminating m from (1) and (2) we get the required locus of the foot of the perpendicular

as y = – +

or (x 2 + y 2 ) 2 = a 2 x 2 + b 2 y 2 .

Which does not represent a circle, an ellipse or a hyperbola.

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