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MOTOR VEHICLE ELECTRIC’S. INTRODUCING. OHM’S LAW BY PAUL LANE. Original Power Point Created by Paul Lane Modified by Georgia Agricultural Education Curriculum Office June 2002. WHERE DID OHM’S LAW COME FROM?. OHM’S LAW. TO UNDERSTAND OHM’S LAW WE MUST
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MOTOR VEHICLE ELECTRIC’S INTRODUCING OHM’S LAW BY PAUL LANE Original Power Point Created by Paul Lane Modified by Georgia Agricultural Education Curriculum Office June 2002
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
ELECTRICAL SYMBOLS ONE WAY DIODE VARIABLE RESISTOR EARTH WIRES CROSSING WIRES JOINING IGNITION COIL CONTACT POINT
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.
V = 12 VOLTS R = 18 OHM’S USING THIS SIMPLE TRIANGLE WE CAN SEE THAT: V I = V I R R 12 I = 18 0.6 I =