Frequency from oscilloscope period

Steps:

• The oscilloscope trace spans 1.2 ms, showing 2 complete cycles of the waveform.
• Time for one cycle (period T) = total time / number of cycles = 1.2 ms / 2 = 0.6 ms.
• Convert to seconds: T = 0.0006 s.
• Frequency f = 1 / T = 1 / 0.0006 ≈ 1670 Hz, closest to 1700 Hz.

Why C is correct:

• Matches the formula f = 1/T, where T is the period from the trace's cycle time.

Why the others are wrong:

• A: Assumes ~6 cycles in 1.2 ms, overestimating periods.
• B: Assumes ~40 cycles, far too many for the trace.
• D: Assumes ~4 cycles, underestimating frequency.

Final answer: C