||Inside a capacitor are two surfaces, separated by insulating material. When the capacitor is charged, one surface is positively charged, the other is negatively charged.
|Conductors & insulators
||Conductors are materials that allow electrical current to flow. Insulators are materials that do not allow electrical current to flow.
||Electric wires are used to conduct electric current around the motor vehicle.
||To prevent noise (interference), some vehicles use shielded wiring harnesses. The type of shielding used can be one of three forms: twisted pair, Mylar tape and drain lines.
||There are two scales used to measure the sizes of wires: Metric and AWG (American Wire Gauge).
|Length vs. resistance
||As the length of the wire increases, so does the resistance within the wire. Therefore the greater the length of the wire, the larger the cross-sectional area needs to be.
|Fuses & circuit breakers
||Fuses and circuit breakers are used to protect electrical systems from allowing too much current to flow.
||Relays act as switches that are turned on and off by a small current. They can allow large current to be switched on and off in a circuit.
|Ballast resistor||The ballast resistor is used to reduce the voltage to the ignition coil during normal running conditions.|