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A 4.0 Ω resistor is connected across the terminals of a 10.0 V battery. If 0.50...

A 4.0 Ω resistor is connected across the terminals of a 10.0 V battery. If 0.50 A of current flows, what is the internal resistance of the battery? Group of answer choices

8 Ω

16 Ω

20 Ω

4 Ω

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