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U14 Cn1 Intro To Current
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U14 Cn1 Intro To Current

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Introduction to electric current concepts

Introduction to electric current concepts

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Transcript

  • 1. Introduction to Electric Current E. Alexander Burt Unit 14 class 1
  • 2. Definition
    • Current is the flow of charge over time.
    • In the SI sytem of units, current is measured in Amperes (Amps for short). One amp equals one Coulomb per second.
    • In order for current to flow:
      • There must be a potential difference (voltage)
      • There must be a conductor.
  • 3. Equation:
    • In symbols: I = Q / t
      • I is current in Amps
      • Q is charge in Coulombs
      • t is time in seconds.
  • 4. More current concepts:
    • “Conventional Current” is defined to be the flow of positive charge.
      • Because electrons are the moving charges, the flow of electrons are in the opposite direction.
      • Conventional current flows from the positive battery terminal to the negative battery terminal
  • 5.