Physics (AS & A Level) · Oct / Nov 2016 · Paper 13 · Question 5

A student uses a cathode-ray oscilloscope (c.r.o.) to measure the period of a signal. She sets the time-base of the c.r.o. to 5 ms cm⁻¹ and observes the trace illustrated below. The trace has a length of 10.0 cm. What is the period of the signal?

1. A7.1 × 10⁻⁶ s
2. B1.4 × 10⁻⁵ s
3. C7.1 × 10⁻³ s
4. D1.4 × 10⁻² s

As printed in the paper