Ohm's law
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Ohm’s Law states that current flow in a circuit varies in direct proportion to changes in voltage, and in inverse proportion to the changes in resistance.
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Electrical power
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In an electrical circuit, the unit of power is the watt. 1 watt is produced when 1 volt causes a current flow of 1 ampere.
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Watt
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It is the rate in joules per second at which energy is being converted, used, or dissipated.
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Electrical measurement
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An ammeter is connected in series. A voltmeter is connected in parallel. With an ohmmeter, the item to be tested must first be disconnected from its circuit.
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Series circuits
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In a series circuit, the same current flows through every point of the circuit, but the voltage at different points can change.
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Parallel circuits
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In a parallel circuit, all components are connected directly to the voltage supply. If one of the connections or components fails in a parallel circuit, current continues to flow through the rest.
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Parallel circuit resistance
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Total resistance in a parallel circuit is found by adding the reciprocals of each resistance, then turning the answer back up the way it was.
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Series-parallel circuits
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Series-parallel circuits are analyzed using the laws applied to separate series or parallel circuits.
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Wire sizing
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Wire size is very important for the correct operation of electrical circuits. Selecting too small a gauge wire for an application will adversely effect the operation of the circuit. Selecting too large a gauge increases costs and weight.
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Networking & multiplexing
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A multiplex network reduces the number of wires in the wiring harness and greater vehicle content flexibility.
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| Fiber optics |
Fiber optics are long, thin strands of very pure glass about the diameter of a human hair. They can be arranged in bundles and are called optical cables. Light signals can be transmitted along the cable over very long distances. |
