Question

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

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

Answer 1

Answer: (D)

2$\sqrt{3}$

Answer 2

A & A¢ (±2, 0); S & S¢ (±1, 0) centre C (0, 0)

Q CS = ae = 1 Ž e = ½

\ b² = a² (1 – e²) = 3

Ž b = $\sqrt{3}$ Hence, minor axis = 2b = 2$\sqrt{3}$