Question

Please help. Oscilloscope question.
Question in attached file.

Answer 1

@Abhisar

Answer 2

@aaronq

Answer 3

The wave repeats every 4 squares. Each square is 1 cm long so:
\[Period: 4cm \times \frac{ 2.5ms }{cm } =10ms\]

Peak voltage: starting from the horizontal line, the max height of the wave is around 3.4 squares, so 3.4 cms.

\[Peak voltage: 3.4 cm \times \frac{ 5mV }{ cm }=17mV \]

So option C.

Answer 4

Very good, and if they had asked for "peak to peak" then D., but they did not, @telco17 nailed it. By the way, the Oscilliscope is an everyday tool for radar technicians.

Answer 5

Thanks, but shouldn't you convert units first? :)
Umm I usually do it in a different way so What's the general formula I should use when solving such questions?

Answer 6

@radar