Question

For eccentricity in ellipse (e) which relation is correct?

(a) e < 1

(b) e = 1

(c) e > 1

(d) e = ∞

I got this question in quiz.

The above asked question is from Curves Used in Engineering Practice topic in portion Lettering Practice, Scales & Curves of Civil Engineering Drawing

Answer 1

Correct option is (a) e < 1

The best explanation: Eccentricity can be defined as a parameter associated with every conic section. It can be thought of a measure of how much the conic section deviates from being circular.  When (e < 1    Ellipse), (e = 1     Parabola), (e > 1     Hyperbola), (e = ∞   straight line), (e = 0   Circle).