Which of the following describes a signal in the time domain?
Power at intervals of phase
Amplitude at different times✓الإجابة الصحيحة
Frequency at different times
Discrete impulses in time order
الشرح
A time-domain view plots how the signal amplitude varies as time advances, which is exactly what an oscilloscope displays. Presenting the same signal against frequency instead gives the frequency-domain view produced by a spectrum analyser.