1. MOTOR VEHICLE ELECTRIC’S INTRODUCING OHM’S LAW BY PAUL LANE

2. WHERE DID OHM’S LAW COME FROM?

3. OHM’S LAW TO UNDERSTAND OHM’S LAW WE MUST FIRST LEARN SOME SIMPLE ELECTRICAL SYMBOLS: SINGLE CELL FUSE SINGLE ACTION SWITCH CAPACITOR BULB RESISTOR

4. ELECTRICAL SYMBOLS ONE WAY DIODE VARIABLE RESISTOR EARTH WIRES CROSSING WIRES JOINING IGNITION COIL CONTACT POINT

5. OHM’S LAW WHAT IS OHM’S LAW? V= I  R Where:V = VOLTAGE I = CURRENT R = RESISTANCE EXAMPLE: A 12 VOLT BATTERY SUPPLIES POWER TO A HEATED REAR WINDOW WHICH HAS A RESISTANCE OF 18 OHM’S. CALCULATE HOW MUCH CURRENT IS FLOWING THROUGH THE HEATED WINDOW.

6. V = 12 VOLTS R = 18 OHM’S V IR USING THIS SIMPLE TRIANGLE WE CAN SEE THAT: I = V R I = 12 18 I = 0.6 

7. OHM’S LAW MADE BY PAUL LANE OCTOBER 2000