Physics (AS & A Level) · Oct / Nov 2021 · Paper 11 · Question 4
A cathode-ray oscilloscope (CRO) is used to display a sound wave of frequency 2000 Hz. The display of the CRO is shown. [diagram of CRO trace with 1 cm grid markings] What is the time-base setting on the CRO?
- A125 µs cm⁻¹
- B250 µs cm⁻¹
- C500 µs cm⁻¹
- D1000 µs cm⁻¹
As printed in the paper
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Correct answer: A. 125 µs cm⁻¹
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