character: George Westinghouse
topic: Development of AC Power Systems
grade: 9
subject: Chemistry
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character: Nikola Tesla
topic: Alternating Current Innovations
grade: 9
subject: Chemistry
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character: Thomas Edison
topic: Direct Current Systems
grade: 9
subject: Chemistry
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character: Michael Faraday
topic: Electromagnetic Induction
grade: 9
subject: Chemistry
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