A+ Chapter 8 Power Words - Defined

Chapter 8 - Power Supplies

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1. Active PFC: Active PFC uses electronic circuits in efficiently distributing power to devices connected to the power supply.
2. AC: Alternating current is an electric current which periodically reverses direction, in contrast to direct current which flows only in one direction.
3. Amperage: the strength of an electric current in amperes.
4. Amps: the base unit of electric current in the International System of Units.
5. Current: rate of flow of electric charge past a point or region.
6. DC: direct current is the unidirectional flow or movement of electric charge carriers.
7. Dual-voltage: A dual voltage device can accept both 110-120V and 220-240V.
8. FRU: A field-replaceable unit is a printed circuit board, part.
9. IEC-320: based on standards created by the International Electrotechnical Commission
10. Joule: the SI unit of work or energy.
11. Mini Connector: a plug and socket widely used for analog audio signals in portable devices.
12. Molex Connector: a two-piece pin and socket interconnection.
13. Multimeter: an instrument designed to measure electric current, voltage, and usually resistance, typically over several ranges of value.
14. Multi-rail: power supplies that have more than one OCP circuits are referred to “multiple-rail”.
15. Ohms: the SI unit of electrical resistance
16. P1 power connector: P1 is a label of power cable that connects the power supply to the motherboard.
17. P2 power connector: P2 is a label of power cable that connects the power supply to the motherboard.
18. PCIe 6/8- pin power connector: This connector is used to provide extra 12 volt power to PCI Express expansion cards.
19. Power conditioning: a device intended to improve the quality of the power that is delivered to electrical load equipment.
20. Power supply fan: The power supply fan blows hotter air out of the power supply and out of the computer.