The diagram illustrates a transformer. The primary coil contains 800 turns, while the secondary coil contains 40 turns. An input voltage of $240\,\text{V}$ is supplied. What output voltage is obtained?
- A$6.0\,\text{V}$
- B$12\,\text{V}$
- C$20\,\text{V}$
- D$40\,\text{V}$