Automotive Electricity Fundamental (edited)
Terms in this set (26)
What are the 3 basic particles that make up all elements?
Proton, neutrons, and electrons
Does an electron have a single positive or single negative charge?
Do 2 electrons repel or attract each other?
What term is used for the flow of electrons along a wire from a negative terminal to a positive ?
What is an electrical conductor?
Any type of material which permits an electrical current to flow through it
Why is copper a good conductor?
Because it has only 1 free electron, which is not strongly held in its atomic orbit
What are the most commonly used insulating substances in automotive applications?
Plastic, rubber, and fiberboard
What is the most common semiconductor?
Silicon, which is neither a good conductor nor a good insulator
What is a diode?
An electrical device that allows a current to pas through in only a single direction
What is a zener diode?
A special diode that is used to conduct current in the reverse direction so long as the voltage is above a predetermined set value
Where are zener diodes employed?
In control circuits (such as voltage regulators)
What is a transistor?
They are remote control switches that use a small current circuit to control a high current circuit
Which type of transistor allows a high current negative charge to flow from a collector to an emitter when a relatively low current positive charge is applied to the base?
The NPN transistor
What is the unit of measurement of current flow?
What is the basic unit of resistance to electron flow?
What is Ohn's Law?
The physical law which relates current (I), voltage (E), and resistance (R) in a circuit, stated as: E = I X R
What is the formula for finding the amperage using Ohn's Law?
I = E/R
What term is used for the operation of connecting 1 side of an electrical component to the car battery and the other side to the body of the car in a automobile circuit?
Frame ground (one wire)
Is the total resistance of a series circuit equal to the sum of each individual load?
Yes (in parallel circuit the total resistance is less than the resistance of any single component)
Would any break in a series circuit cause the entire circuit to become inoperative?
Yes, such as burned-out bulb, for ex.
Would the burning out or disconnection of any single component in a parallel circuit alter the operation of the other components in the circuit?
What is the minimum number of resistance units required in order to have a series-parallel circuit?
At least 3
What is any break or interruption in a circuit called?
And open circuit
What is a short circuit?
A condition when any portion of a wiring circuit accidentally touches the vehicle frame
What causes a short circuit?
Any touch of copper by copper, such as when the wiring insulation between 2 wires deteriorates and the wiring makes contact
What type of core is used in nearly all electromagnets?
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