2 electric current

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2 electric current

  1. 1. Electric Current
  2. 2. <ul><li>Current - flow of electrons through a wire or any conductor. </li></ul><ul><li>Potential difference (voltage)- the difference in potential between two different places. </li></ul><ul><li>Resistance - the tendency for a material to oppose the flow of electrons, changing electrical energy into thermal energy & light. </li></ul>
  3. 3. <ul><li>Ohm’s Law- states that potential difference equals current times the resistance. </li></ul><ul><li>-All conductors have some resistance. </li></ul>
  4. 4. <ul><li>Ohm’s Law equation </li></ul><ul><li>Variable Ending Units </li></ul><ul><li>Voltage (V) volts </li></ul><ul><li>Current (I) amps </li></ul><ul><li>Resistance (R) ohms or Ω </li></ul>
  5. 5. <ul><li>V = I x R </li></ul><ul><li>I = V / R </li></ul><ul><li>R = V / I </li></ul>V I R x . . . .

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