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Electricity

Electricity. Ohm’s Law. What is Ohm’s Law?. The relationship between Voltage, Amperes and Resistance Online Simulation link. Huh. What is Ohm’s Law?. Ohm’s Law

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Electricity

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Presentation Transcript

  1. Electricity Ohm’s Law

  2. What is Ohm’s Law? • The relationship between Voltage, Amperes and Resistance • Online Simulation link

  3. Huh What is Ohm’s Law? • Ohm’s Law • the current (I) passing between two points is inversely proportional to the resistance (R) between them and proportional to the force (V) across the two points

  4. What is Ohm’s Law? • Ohm’s Law • the current (I) passing between two points is inversely proportional to the resistance (R) between them … • and proportional to the force (V) across the two points. I = ----- R 1 V I  V As resistance goes up, current goes down and visa versa! If the volts are increased, so is the current (amps)

  5. Ohm’s Law - explained • If water pressure (force ) remains the same • and the clog (resistance) gets bigger • the water flow (current) slows down

  6. Ohm’s Law - explained If the voltage (V) stays the same and resistance (R)increases, then current (I)decreases. V = R I  12 = 6 2 12 = 3  4

  7. Simple Illustration

  8. Ohm’s Law - explained • If the clog in the pipe increases, • then the water pressure must increase to keep • The water flow the same.

  9. Ohm’s Law - explained • If the resistance increases, • then voltage must increase to keep • the current steady. V = I R  24 = 6 4 12 = 3  4

  10. Ohm’s Law Practice • Volts = 24, Ohms = 3, Amps = ? • Ohms = 5, Amps = 6, Volts = ? • Amps = 2, Volts = 32, Ohms = ?

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