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CompTia A+ > Chapter 5: Power supplies, Display Devices, and Periherals > Flashcards

Chapter 5: Power supplies, Display Devices, and Periherals Flashcards

1
Q

Volt

A

Measurement of the pressure of electrons

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2
Q

Watt

A

Measurement of the actual power delivered

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3
Q

Amp

A

Measurement of flow rate of electrons through a wire

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4
Q

What does a power supply do

A

Converts AC voltage into DC voltage

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5
Q

What is the range of power supply units and how are they measured

A

Power supply for desktop computers range up to 1200 watts, measured in watts

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6
Q

What is an AC adapter

A

Form of power supply used with portable computers and external peripherals

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7
Q

What’s the characterisitic of an ATX- power supply

A

Uses a 20-pin (p1) connector

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8
Q

What is a video adapter

A

Controls the output from the PC to the display device, may be built into a motherboard or may be a separate board that plugs into PCI, AGP, or PCIe connector

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9
Q

What are some display connectors

A

DB-15 (VGA), DVI, HDMI, Displayport, Composite Video, and Component video

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10
Q

Common electronic PC’s use what type of cables

A

Straight, Twisted, and coaxial

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11
Q

What are the two most common displays types for PC’s

A

CRT, FPD; FPD’s have largely replaced CRT

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12
Q

What kinds of lighting technology does and FPD use

A

LCD, LED, or plasma; tablets use OLED AMOLED

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13
Q

What are the most common types of output devices

A

Displays, Printers, and Sound Cards

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14
Q

What is a KVM switch

A

Allows a single person using one keyboard, video display, and pointing device to control many computers

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15
Q

What should a technician never use when working with a PSU

A

An anti static wrist band

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16
Q

What is a DVI

A

Digital Visual Interface- offers downward compatibility with analog displays; supports both analog and digital signals

17
Q

Display ports

A

Supports both analog and digital signals and has the thinnest cable and the smallest connectors

18
Q

DB-15 (VGA)

A

Used on video adapter cards for connecting to both CRT and many flat panel monitors

19
Q

What are some types of DVI connectors

A

DVI-A, DVI-I, DVI-D

20
Q

What are some types of gaming input devices

A

Joystick (primitive), Gampad ( ideal for computer games), Digitizer ( used for working with drawings and schematics) it converts the analog data into digital data, Bar code reader

CompTia A+ (5 decks)

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