Understanding Power Supplies in Computers

These flashcards cover key terms related to power supplies, electrical concepts, and safety precautions in computer hardware.

Power Supply

A device that converts AC power from a wall outlet to the DC power required by a computer's components.

AC (Alternating Current)

An electric current that reverses direction periodically, commonly used in homes and buildings.

DC (Direct Current)

An electric current that flows in one direction with a constant voltage.

Volts (V)

A unit of measurement for voltage, representing the electric pressure in a circuit.

Amps (A)

A unit of measurement for electric current, indicating the number of electrons flowing.

Watts (W)

A measurement of electrical power, calculated as volts multiplied by amps.

Hertz (Hz)

A unit of frequency equal to one cycle per second, often used to describe the frequency of AC power.

Efficiency Rating

A measure of how much power is lost during the conversion from AC to DC, typically expressed as a percentage.

Modular Power Supply

A power supply with detachable cables, allowing users to connect only the cables they need.

Redundant Power Supply

A system with multiple power supplies that can maintain operation if one fails.

Capacitors

Components that store electrical energy and can pose risks if not properly discharged before work on a computer.

Standby Power

The power provided to a motherboard when in a sleeping state, usually denoted as 5 volts SB.

Connector

The part of the power supply that connects to the motherboard and transfers power.

Voltage Switch

A manual switch on older power supplies to select the appropriate input voltage.