A battery has emf 24.0 V and internal resistance 3.00 Ω. A resistor of resistance R is connected to the battery. What are the two values of R for which 21.0 W of electrical power is consumed in the resistor?

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A battery has emf 24.0 V and internal resistance 3.00 Ω. A
resistor of resistance R is connected to the battery. What are the two
values of R for which 21.0 W of electrical power is consumed in the
resistor?

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