Electric Current.

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Presentation transcript:

Electric Current

Current- flow of electrons through a wire or any conductor. Potential difference (voltage)- the difference in potential between two different places. Resistance- the tendency for a material to oppose the flow of electrons, changing electrical energy into thermal energy & light.

Ohm’s Law- states that potential difference equals current times the resistance. -All conductors have some resistance.

Ohm’s Law equation Variable Ending Units Voltage (V) volts Current (I) amps Resistance (R) ohms or Ω

V = I x R I = V / R R = V / I V . . R I x