A perfect battery holds its terminal voltage no matter the current. It has no:
AInternal reflection
BInternal refraction
CInternal resistance
DInternal recording
Answer & Solution
Correct answer: C. Internal resistance
1. Any inner resistance would drop some volts.
2. A perfect source drops none.
3. So it has no internal resistance.
_Source: OpenStax University Physics Volume 2, Chapter 10, Direct-Current Circuits._
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