Question

Why is the impulse duration important?

(a) It is zero

(b) It changes with time

(c) It approaches zero

(d) It depends on the situation

This question was posed to me during an interview.

I'm obligated to ask this question of The Impulse Function topic in division Signals and Systems Basics of Signals and Systems

Answer 1

The correct answer is (c) It approaches zero

Easy explanation: One of the most interesting features of the impulse function, is not its shape, but the fact that its effective duration (pulse width) approaches zero, while the area remains unity. Hence, ∫∂(t)dt=1.