alleryStart learning →A battery's output voltage falls when it is depleted or overloaded because of its:
AInternal resistance
BThe external wiring
CIts physical size
DThe terminal colour
Answer & Solution
Correct answer: A. Internal resistance
1. Something inside the source drops voltage as current rises.
2. Output voltage decreases for depleted or overloaded batteries.
3. All voltage sources have two fundamental parts.
4. Those parts are a source of electrical energy and an internal resistance.
5. That internal resistance is the reason for the decrease in output voltage.
_Source: OpenStax College Physics for AP Courses 2e (CC BY 4.0), Ch 21 'Circuits and DC Instruments', sections 21.1-21.6_
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