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Because the internal resistance sits in series with the load, it affects the current delivered and the:

ARoom temperature
BMeter casing
CTerminal voltage
DWire colour
Answer & Solution
Correct answer: C. Terminal voltage
1. Some voltage is lost inside the source. 2. Less reaches the load. 3. It affects the terminal voltage. _Source: OpenStax University Physics Volume 2, Chapter 10, Direct-Current Circuits._
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