SYSTEM UNIT

Unknown   March 24, 2017   COMPUTER SKILLS   Comment  

 CLASSNo.6

SYSTEM UNIT.

• This is the computer, and anything which can be attach to it is a peripheral or devices.

   

    
  

  INSIDE THE COMPUTER.

  •  Power Supply.

      Converts AC power from the wall socket into DC Must provide enough power for the installed components and future additions.

    
    

    
    

     

    Four Basic Units of Electricity.
    
    
    • Voltage (V) is a measure of the force required to push electrons through a circuit. Voltage is measured in volts. A computer power supply usually produces several different voltages.
    •   Current (I) is a measure of the amount of electrons going through a circuit. Current is measured in amperes, or amps (A). Computer power supplies deliver different amperages for each output voltage.
    •  Power (P) is voltage multiplied by current. The measurement is called watts (W). Computer power supplies are rated in watts.
    • Resistance (R) is the opposition to the flow of current in a circuit. Resistance is measured in ohms. Lower resistance allows more current to flow through a circuit.