I am preparing for the written test conducted by IISc Bangalore for admission into their graduate program. I happened to come across a sample paper from 2016, I think.
I am struggling to understand the 11th question,
Since phasors are sinusoids, I think the answer is 0. But, here they called it a "time signal" and specified a finite time range.
So even if I considered a windowed version of the periodic signal, then since the Fourier transform of the signal at 0 frequency is finite, I can conclude the time average value is still 0.
So my question is, what is the answer? which of my interpretation would be correct? Also how can complex signals be "time signals", is there any physical interpretation of "dc component" of sum of spinning phasors?