How to Calculate Thevenin Norton
What is Thevenin Norton?
Simplifies complex circuits into single voltage source (Thevenin) or current source (Norton) for easier analysis. Equivalent circuits valid for load analysis.
Formula
Vth = Isc × Rth
Step-by-Step Guide
- 1Thevenin voltage: open circuit voltage at terminals
- 2Thevenin resistance: resistance seen with sources removed
- 3Norton current: short circuit current
- 4Norton resistance equals Thevenin resistance
- 5Vth = Isc × Rth
Worked Examples
Input
RTh=100ohm, VTh=10V
Result
Thevenin equiv
Common Mistakes to Avoid
- ✕Not properly calculating open circuit voltage
- ✕Forgetting to remove sources for equivalent resistance
Frequently Asked Questions
When should I use Thevenin equivalents?
To analyze different load impedances without recalculating entire circuit.
Are Thevenin and Norton equivalent?
Yes; same underlying network; Thevenin more common for voltage sources, Norton for current.
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