A Resistor of Unknown Resistance and a 15-Ω Resistor Are

question 63

Multiple Choice

A resistor of unknown resistance and a 15-Ω resistor are connected across a 20-V emf in such a way that a 2.0 A current is observed in the emf. What is the value of the unknown resistance?

• A) 75 Ω
• B) 12 Ω
• C) 7.5 Ω
• D) 30 Ω
• E) 5.0 Ω

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