alleryStart learning →What does the internal resistance of a battery describe?
AResistance of the wires that lead to its load
BResistance to current within the battery itself
CResistance that its load offers to the current
DResistance the meter adds while it measures
Answer & Solution
Correct answer: B. Resistance to current within the battery itself
1. Charge has to move through the chemicals and plates inside a cell, and those substances resist it.
2. That inherent opposition inside a cell is what internal resistance means.
3. Wire resistance and load resistance lie outside the cell and are counted separately.
4. Internal resistance grows as a battery is depleted, which is why an old cell sags under load.
_Source: OpenStax College Physics (CC BY 4.0), Ch 21 "Circuits and DC Instruments", section 21.2 Electromotive Force: Terminal Voltage_
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