How is the Thevenin resistance Rth calculated
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Answer: D. between same open terminals as for Etk
Explanation
Thevenin resistance calculations require measuring between the exact open terminals. Open-circuit voltage establishes the reference potential for the equivalent circuit. Internal resistance determines how the terminal voltage sags under load. Thévenin's theorem simplifies two-terminal networks into a voltage source and series resistance. Deactivating independent sources isolates the passive impedance of the network. Terminal pairs must remain identical between voltage and resistance calculations.
Engineers use Thévenin equivalents to simplify complex power distribution calculations. Impedance matching procedures rely on accurate determination of equivalent terminal resistance. Sensor modeling often utilizes Thévenin equivalents to represent transducer output limits. Removing voltage sources alone without proper deactivation fails to yield correct resistance. Short-circuiting the two terminals would yield zero resistance rather than Rth. Between any ‘open’ terminals is too vague since terminals must match the open-circuit voltage.
- Subject
- Engineering
- Category
- Electrical Engineering
- Topic
- —
- Difficulty
- medium
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