A signal with frequency $25\,\text{Hz}$ is shown on the screen of a cathode-ray oscilloscope. What time-base setting is needed?
- A$10\,\text{ms cm}^{-1}$
- B$20\,\text{ms cm}^{-1}$
- C$25\,\text{ms cm}^{-1}$
- D$40\,\text{ms cm}^{-1}$
Physics 9702 · AS & A Level · Practical circuits