5 Questions
According to Thévenin's theorem, what can a linear electrical network containing only voltage sources, current sources, and resistances be replaced by at terminals A–B?
An equivalent combination of a voltage source and a resistance
What is the equivalent voltage Vth obtained at terminals A–B of the network when terminals A–B are open circuited?
The voltage obtained at terminals A–B of the network with terminals A–B open circuited
What is the equivalent resistance Rth in Thévenin's theorem?
The resistance that the circuit between terminals A and B would have if all ideal voltage sources were replaced by a short circuit and all ideal current sources were replaced by an open circuit
In circuit theory terms, what does Thévenin's theorem allow any one-port network to be reduced to?
A single voltage source and a single impedance
How does Thévenin's theorem apply to frequency domain AC circuits consisting of reactive (inductive and capacitive) and resistive impedances?
The theorem applies for AC in an exactly same way to DC except that resistances are generalized to impedances.
Study Notes
Thévenin's Theorem
- A linear electrical network containing voltage sources, current sources, and resistances can be replaced by an equivalent circuit consisting of a single voltage source and series resistance connected to a load.
- The equivalent voltage (Vth) is obtained by calculating the open-circuit voltage at terminals A-B when they are open-circuited.
- The equivalent resistance (Rth) is the total resistance measured across the terminals A-B when all voltage sources are turned off.
- Thévenin's theorem allows any one-port network to be reduced to a simple series circuit consisting of a voltage source and a resistance.
- The theorem applies to frequency domain AC circuits consisting of reactive (inductive and capacitive) and resistive impedances, enabling the simplification of complex circuits for analysis.
Test your knowledge of Thévenin's theorem as applied to direct-current resistive circuits. This theorem allows for the simplification of complex networks into equivalent circuits, enhancing the analysis and design process.
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