Power supply unit a power supply unit psu


Determine if the statement is true or false



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self-study II

3 Determine if the statement is true or false.

  1. Older personal computers universally use switched-mode power supplies.

  2. Some power supplies have a manual switch for selecting input voltage.

  3. ATX power supply always provides a 5-volt standby (5 VSB) power so that the standby functions on the computer and certain peripherals are powered.

  4. ATX power supplies aren’t turned on and off by a signal from the motherboard.

  5. The most recent ATX PSU standard is version 2.0 as of mid-2022.

Vocabulary
4


5



1




4




2




5




3




6




6 Find the definition of the following words

the internal




component




input voltage




power supplies




motherboard




Answer keys1
1

  1. A power supply unit (PSU) converts main AC to low-voltage regulated DC power for the internal components of a computer

  2. Universally

  3. 5-volt

  4. it always provides 5 volt standby (5VSB) power.

  5. 3.0

2
1) mains AC
2) power supplies
3) ATX specification
4) volt
5) the motherboard
3

  1. False

  2. True

  3. True

  4. False

  5. False

5

1

B

4

E

2

C

5

F

3

A

6

D

6

the internal

of or situated on the inside

component


an important component of the program

input voltage

Suitable for operation at voltage of connected source, with variation tolerance of plus or minus 10 percent.

power supplies

a source of power, such as the mains or a generator

motherboard

the main printed circuit board (PCB) in a computer.

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