U14 Cn1 Intro To Current

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Introduction to electric current concepts

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U14 Cn1 Intro To Current

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

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