MOTOR VEHICLE ELECTRIC’S INTRODUCING OHM’S LAW BY PAUL LANE.
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Transcript of MOTOR VEHICLE ELECTRIC’S INTRODUCING OHM’S LAW BY PAUL LANE.
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MOTOR VEHICLE ELECTRIC’S
INTRODUCING
OHM’S LAW BY PAUL LANE
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Ohm, Georg Simon
BORN: March 16, 1789, Erlangen, Bavaria [Germany]DIED: J uly 6, 1854, Munich
German physicist who discovered the law, named after him,which states that the current flow through a conductor is directlyproportional to the potential difference (voltage) and inverselyproportional to the resistance.Ohm became professor of mathematics at the J esuits' College atCologne in 1817. While his work greatly influenced the theory andapplications of current electricity, it was so coldly received thatOhm resigned his post at Cologne. He accepted a position at thePolytechnic School of Nürnberg in 1833. Finally his work began tobe recognized; in 1841 he was awarded the Copley Medal of theRoyal Society of London and was made a foreign member a yearlater. The physical unit measuring electrical resistance was givenhis name: OHMS LAW.
WHERE DID OHM’S LAW COME FROM?
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OHM’S LAWTO UNDERSTAND OHM’S LAW WE MUSTFIRST LEARN SOME SIMPLE ELECTRICALSYMBOLS:
SINGLE CELL
FUSE
SINGLE ACTION SWITCH
CAPACITOR
BULB
RESISTOR
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ELECTRICAL SYMBOLS
ONE WAY DIODE
VARIABLE RESISTOR
EARTH
WIRES CROSSING
WIRES JOINING
IGNITION COIL
CONTACT POINT
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OHM’S LAW
WHAT IS OHM’S LAW?
V= I R
Where: V = VOLTAGE I = CURRENTR = RESISTANCE
EXAMPLE:A 12 VOLT BATTERY SUPPLIES POWERTO A HEATED REAR WINDOW WHICHHAS A RESISTANCE OF 18 OHM’S.
CALCULATE HOW MUCH CURRENT IS FLOWING THROUGH THE HEATED WINDOW.
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V = 12 VOLTSR = 18 OHM’S
V
I R
USING THIS SIMPLE TRIANGLEWE CAN SEE THAT:
I = VR
I = 1218
I = 0.6