Question

If the foci and vertices of an ellipse be (±1,0) and ( ±2,0) , then the minor axis of the ellipse os

• A. $2\sqrt{5}$
• B. 2
• C. 4
• D. $2\sqrt{3}$

Answer 1

The correct option is D

$2\sqrt{3}$

$ae=1,a=2,e=\frac{1}{2}\Rightarrow b=\sqrt{(1-\frac{1}{4})}=\sqrt{3}$

Hence minor axis = 2 $\sqrt{3}$ .