MATChapter_8ElectricityElectronics
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Transcript of MATChapter_8ElectricityElectronics
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Modern AutomotiveModern Automotive Technology Technology
Chapter 8Chapter 8
Basic Electricity andBasic Electricity and
ElectronicsElectronics
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Learning ObjectivesLearning Objectives
z Explain the principles of electricity
z
Describe the action of electricityz Compare voltage, current (amps) and
resistance (ohms).
z Describe the principles of magnetism
z Identify basic electronic and electronic
termsz Explain different types of electrical wiring
z Read and follow all safety procedures whenworking on electric circuit
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Current, Voltage, andCurrent, Voltage, and
ResistanceResistance
One volt can push one amp of current throughone ohm of resistance
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OhmOhm’’s Laws Law
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MultimeterMultimeter
Digital Volt Ohm MeterDigital Volt Ohm Meter
Digital display on a modern multimeter
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MultimeterMultimeterDigital Volt Ohm MeterDigital Volt Ohm Meter
Also called a DVOM–combines an ohmmeter,
ammeter, and voltmeter in one tool
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Simple CircuitSimple Circuit
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Chapter 8Chapter 8
1. RESISTANCERESISTANCE is the opposition tocurrent flow.
2. A FUSEFUSE protects a circuit againstdamage caused by a short circuit.
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Ohmmeter ConnectionsOhmmeter Connections
Never connect an ohmmeter to a “live” circuit
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FuseFuse
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Chapter 8Chapter 8
3. An ATOMATOM consists of small particlescalled protons, neutrons, and electrons.
4. CURRENTCURRENT is the flow of electronsthrough a conductor.
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AtomAtom
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Ammeter ConnectionsAmmeter Connections
An ammeter is connect in SERIES to the circuit
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OneOne
--Wire CircuitWire Circuit
Vehicle’s frame or body serves as an
electrical conductor
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Chapter 8Chapter 8
5. An INTEGRATED CURCUITINTEGRATED CURCUIT containsalmost microscopic diodes, transistors,resistors, and capacitors in a chip.
6. VOLTAGEVOLTAGE is the force or electrical
pressure that causes current flow.
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Integrated Circuit (IC)Integrated Circuit (IC)
Contains microscopic diodes, transistors,
resistors, and capacitors in a wafer-like chip
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Chapter 8Chapter 8
Basic Electricity and ElectronicsBasic Electricity and Electronics
7. ELECTRICITYELECTRICITY is the movement of
electrons from atom to atom.
8. INSULATORSINSULATORS do not contain freeelectrons.
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Voltmeter ConnectionsVoltmeter Connections
A voltmeter is connect in PARALLEL to the circuit
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Transistor Versus Relay Transistor Versus Relay
Transistor operation
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Chapter 8Chapter 8
Basic Electricity and ElectronicsBasic Electricity and Electronics
9. A SHORTSHORT--CURCUITCURCUIT is caused when a
defective wire or component touchesground.
10. CONDUCTORSCONDUCTORS have atoms thatallow the flow of electricity; contain freeelectrons.
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Circuit FaultsCircuit Faults
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ConductorsConductorsz Allow the flow of electricity
z Contain atoms with free electrons– one to three electrons in the outer orbit
z
Free electrons are not locked in orbitaround the nucleus
– electrons can be forced to move from one
atom to another
z Copper, gold, and silver are good
conductors
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Series and Parallel CircuitsSeries and Parallel Circuits
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Wiring RepairsWiring Repairsz Crimp connectors and terminals
– used to quickly repair wiring
– allow a wire to be connected to another wire
or componentz Harness connectors
– multi-wire terminals that connect several
wires together
– two-part plastic housing snaps together
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Wire TerminalsWire Terminals
and Connectorsand Connectors
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Crimping PliersCrimping Pliers
Stripping off a short section of insulation
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SolderingSoldering
Only use rosin-core solder on electrical repairs!
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Learning ObjectivesLearning Objectives
z Explain the principles of electricity
z
Describe the action of electricityz Compare voltage, current (amps) and
resistance (ohms).
z Describe the principles of magnetismz Identify basic electronic and electronic
termsz Explain different types of electrical wiring
z Read and follow all safety procedures whenworking on electric circuit
