Exam-style question
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Define terminal potential difference and lost volts in the context of an electrical circuit.
Model answer
What a good answer should say
- Terminal potential difference is the voltage output of a power source when a load is connected, while lost volts refer to the voltage drop across the internal resistance of the power source.
- The key difference is that terminal potential difference is the usable voltage available to the load, whereas lost volts represent energy that is not available for external work due to internal resistance.
Explanation
Why this works
This answer is strong because it clearly defines both terms and highlights their key difference. It explains the practical implications of each concept in circuit operation, making it relevant for understanding how power sources function in real applications.
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