Question

What is a fundamental period?

(a) Every interval of a periodic signal

(b) Every interval of an aperiodic signal

(c) The first interval of a periodic signal

(d) The last interval of a periodic signal

This question was posed to me in an interview.

Origin of the question is Periodic Signals topic in chapter Fourier Series of Signals and Systems

Answer 1

The correct option is (c) The first interval of a periodic signal

To elaborate: The first time interval of a periodic signal after which it repeats itself is called a fundamental period. It should be noted that the fundamental period is the first positive value of frequency for which the signal repeats itself.