| Difficulty | Secondary School | High school/other |
| ★ | Basic | Easy |
| ★★ | Demanding | Basic |
| ★★★ | Demanding | |
| ★★★★ | Difficult | |
| ★★★★★ | Very difficult |
How many rounds are there in the transformer coil?
Tip: An unknown coil is connected to the secondary side.
Answer: 330
Exercise 4.5 B
| Difficulty | Secondary School | High school/other |
| ★ | Basic | Easy |
| ★★ | Demanding | Basic |
| ★★★ | Demanding | |
| ★★★★ | Difficult | |
| ★★★★★ | Very difficult |
How much does the measured secondary voltage differ (in volts and percentage) from the predicted secondary voltage of the ideal transformer?
Answer: 0,15 V; 4,6 %
Exercise 4.5 C
| Difficulty | Secondary School | High school/other |
| ★ | Basic | Easy |
| ★★ | Demanding | Basic |
| ★★★ | Demanding | |
| ★★★★ | Difficult | |
| ★★★★★ | Very difficult |
In the video you see transformers in use. How many rounds (turns) are there in the fourth coil?
Answer: 32
