Electronics · AC and power / Principles and inquiry
Transformer experiment guide
Use the turns ratio to check how voltage, current and transferred power change.
How does it work?
In an ideal transformer voltage follows the turns ratio and input power equals output power.
Key relationship
V₂/V₁ = N₂/N₁ · Pout = ηPin
Try this investigation
- Use the turns ratio to check how voltage, current and transferred power change.
- Run and record each of the three baseline presets.
- Compare the changed variable and its result with the baseline records.
Interpreting your results
What input power is needed for 1.152 W output at 90% efficiency?
1.28 W
Assumptions and limitations
DC input current, overheating and switching transients are not modeled. Efficiency losses affect input power only. Experiment on screen; do not reproduce this with real power supplies, outlets or high voltage.