Cambridge International AS & A Level · 21 · structured
Read an AC waveform carefully
Read period, frequency and peak value from an AC trace · Original GioPhysics question with a detailed, mark-by-mark answer guide.
- Demand
- demanding
- Marks
- 5
- Topics
- 1
- Answer
- Complete
Question5 marks
A sinusoidal current trace has positive peaks at 2.0 ms and 10.0 ms and ranges from −0.40 A to +0.40 A. Mark a complete period and the peak current on a sketch. Find the frequency and explain why the time between neighbouring zero crossings is not the period.
Task interpretation
What a complete response should do
Build a visible chain from the information given to the quantity or statement requested.
Split the problem into linked stages and state why each relationship applies.
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- structured
- Allocation
- 5 marks
- Demand
- demanding
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