When a 21-Ω resistor is connected across a 14-V battery,a current of 458 mA flows.What is the internal resistance of the battery?
A) 212 Ω
B) 9.6 Ω
C) 30.6 Ω
D) 0.7 Ω
E) 1.1 Ω
Correct Answer:
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