An oscilloscope's seconds/division switch is set on 20 s/cm. If the trace is 7.5 cm long, what is the period?
A) 0.0015 s B) 150 s C) 1.5 s D) 5 s
Question 2
If the period of a square wave is 22 ms, what is its frequency?
A) 45.5 kHz B) 22 kHz C) 45.5 Hz D) 22 Hz