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Monday, July 1, 2019

The diagram shows two complete pulses on the screen of a cathode-ray oscilloscope. A grid of 1 cm squares covers the screen.


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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