 c

ID: past-exam-of-the-year-2-of-the-earth-sciences-geology-course-of-the-university-of-oxford/2024/paper-3/7/c

The displayed signal is a square wave with levels

+ 1 V

and

- 1 V

, each lasting two seconds. On a representative period it is positive for

0 < t < 2 s

and negative for

2 < t < 4 s

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