Technology
Resistive voltage divider
Find the unloaded output voltage of a two-resistor voltage divider.
Calculators / Technology / Transformer reflected impedance
Transformer reflected impedance calculator
Reflect a secondary resistive load to the primary of an ideal transformer.
On this page
Reflected primary resistance32Ω
Turns ratio2
Calculator controls
How to calculate
Reflect a secondary resistive load to the primary of an ideal transformer.
Reflected primary resistance = z*(a/b)^2 Ω; Turns ratio = a/b
Worked example
Primary turns: 200; Secondary turns: 100; Secondary resistive load (Ω): 8.
Reflected primary resistance: 32 Ω; Turns ratio: 2 .
Assumptions and limits
Uses ideal components and the units shown. This calculation does not establish component ratings, wiring safety or regulatory compliance. This tool uses a real resistive load; winding and core losses are excluded.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Reflect a secondary resistive load to the primary of an ideal transformer.
When this tool is useful
Reflected primary resistance = z*(a/b)^2 Ω; Turns ratio = a/b
Understanding your inputs
| Input | What to enter |
|---|---|
| Primary turns | Enter a number of at least 1e-12 and no more than 1000000000000. |
| Secondary turns | Enter a number of at least 1e-12 and no more than 1000000000000. |
| Secondary resistive load (Ω) | Enter a number of at least 1e-12 and no more than 1000000000000. |
Frequently asked questions
What assumptions does this calculation use?
Uses ideal components and the units shown. This calculation does not establish component ratings, wiring safety or regulatory compliance. This tool uses a real resistive load; winding and core losses are excluded.
How is the result calculated?
Reflected primary resistance = z*(a/b)^2 Ω; Turns ratio = a/b