O Levels Physics (5054)•5054/12/M/J/18
Explanation
DC Voltage on Oscilloscope Trace Steps:
- For DC supply, trace appears as straight horizontal line at voltage height.
- Y-gain of 0.5 V/div means 1.5 V spans 3 vertical divisions from zero.
- Time-base setting irrelevant for steady DC signal.
- Identify trace as flat line exactly 3 divisions above baseline.
Why C is correct:
- Trace C is horizontal line at 3 divisions (1.5 V) per Y-gain scale, matching DC definition of constant potential difference.
Why the others are wrong:
- A: Sloping line indicates varying voltage, not DC.
- B: Horizontal but at 1 division (0.5 V), too low for 1.5 V.
- D: Horizontal at 5 divisions (2.5 V), exceeds 1.5 V.
Final answer: C
Topic: Uses of an oscilloscope
Practice more O Levels Physics (5054) questions on mMCQ.me