Physics 9702 · AS & A Level · Practical circuits

Practical circuits — practice question

The trace below is displayed on the cathode-ray oscilloscope screen. The time-base setting is then altered from $10\,\text{ms cm}^{-1}$ to $20\,\text{ms cm}^{-1}$, while the Y-plate sensitivity stays unchanged. Which trace is displayed on the screen now?

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