Easy MCQ +4 / -1 PYQ · JEE Mains 2024

If the length of the minor axis of an ellipse is equal to half of the distance between the foci, then the eccentricity of the ellipse is :

  1. A $\frac{1}{\sqrt{3}}$
  2. B $\frac{2}{\sqrt{5}}$ Correct answer
  3. C $\frac{\sqrt{3}}{2}$
  4. D $\frac{\sqrt{5}}{3}$

Solution

<p>$$\begin{aligned} & 2 b=a e \\ & \frac{b}{a}=\frac{e}{2} \\ & e=\sqrt{1-\frac{e^2}{4}} \\ & e=\frac{2}{\sqrt{5}} \end{aligned}$$</p>

About this question

Subject: Mathematics · Chapter: Conic Sections · Topic: Parabola

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