3.5 - Computer Power Flashcards
What should you always do before working inside your computer?
Disconnect from the power source.
What should you do if you hear advice to keep everything plugged in while working on your computer?
Disregard that advice and always disconnect from every power source.
What is a challenge when working with components that have capacitors?
They can store power and still shock you even when unplugged.
How should you handle electrical components to avoid shocks?
Never connect any part of your body to any part of the electrical system, including the electrical ground.
What type of current do computer motherboards and components use?
Direct Current (DC).
What type of current is received from the power outlet?
Alternating Current (AC).
What is the purpose of a computer power supply?
To convert AC power from the outlet to DC power for the computer components.
What voltages are commonly provided by power supplies?
3.3V, 5V, and 12V DC.
What is the unit of measurement for the rate of electrons flowing through a wire?
Ampere (or Amp, abbreviated as A).
What does voltage refer to in electrical systems?
The force pushing the electricity through a wire.
What is a watt and how is it calculated?
A watt is a measurement of real power use, calculated by multiplying volts by amps.
What is the frequency of alternating current in the US and Canada?
60 Hertz (Hz).
What is the frequency of alternating current in Europe?
50 Hertz (Hz).
What does a power supply switch allow you to do?
Change between different voltage settings, such as 120V and 230V.
How does a power supply convert AC to DC?
By providing multiple voltages of DC power for different components.
