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Battery-powered light bulb

  1. Feb 18, 2013 #1
  2. jcsd
  3. Feb 18, 2013 #2


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    Staff: Mentor

    It's just regular old electrical current flowing through the filament, heating it up and causing it to produce light. The current and voltage for the light bulb is provided by the battery. Did you have a more specific question?
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