character: George Westinghouse
topic: Commercialization of electrical power distribution
grade: 12
subject: Physics
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character: Thomas Edison
topic: AC vs. DC power systems
grade: 12
subject: Physics
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character: Nikola Tesla
topic: Alternating current development
grade: 12
subject: Physics
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character: Samuel Insull
topic: Growth of electric utilities
grade: 12
subject: Physics
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