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      Question

      In 1831, electricity became viable for use in technology

      when _______ created the electric dynamo.
      A Benjamin Franklin Correct Answer Incorrect Answer
      B Alessandro Volta Correct Answer Incorrect Answer
      C Michael Faraday Correct Answer Incorrect Answer
      D Thomas Edison Correct Answer Incorrect Answer

      Solution

      The operating principle of electromagnetic generators was discovered in the years 1831 - 1832 by Michael Faraday. The principle, later called Faraday's law, is that an electromotive force is generated in an electrical conductor which encircles a varying magnetic flux.

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