character: Nikola Tesla
topic: Alternating Current
grade: 8
subject: Economics
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character: Thomas Edison
topic: Direct Current vs. Alternating Current
grade: 8
subject: Economics
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character: George Westinghouse
topic: Development of AC Power Systems
grade: 8
subject: Economics
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character: Benjamin Franklin
topic: Foundations of Electricity
grade: 8
subject: Economics
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