Question 18
The diagram shows two
complete pulses on the screen of a cathode-ray oscilloscope. A grid of 1 cm
squares covers the screen. The time-base setting is 1 μs
cm-1.
How long does each
pulse last?
A 2 μs B 3 μs C 4 μs D 6 μs
Reference: Past Exam Paper – June 2012 Paper 12 Q6
Solution:
Answer:
A.
Horizontally, the
divisions gives the time while vertically, the division represents the voltage.
Each pulse occupies 2 cm
horizontally.
Time-base setting = 1 μs
cm-1
Duration of pulse = 2 × 1
= 2 μs
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