PhysicsChapter 10: Electromagnetism
The C.r.o. (outline)
Introduction
A C.R.O., or Cathode-Ray Oscilloscope, is an instrument used to display and study changing electrical signals. Modern digital oscilloscopes perform similar functions electronically, but the textbook C.R.O. idea remains useful.
Definition
Display
The screen usually represents: Horizontal axis → time. Vertical axis → voltage. A changing voltage appears as a waveform.
What Can Be Measured
A C.R.O. can help determine: voltage amplitude; time period; frequency; waveform shape.
Frequency
If the period is `T`: **f = 1T**
Example
If one complete cycle takes: **T = 0.005 s then: f = 10.005 = 200 Hz**
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