External Hardware Devices (AQA A-Level Computer Science): Flashcards
📚Flashcards
Practise the cards
10 cards from this deck
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Practise the cards
10 cards from this deck
Sensor types in digital cameras
Sensor types in digital cameras
CCD (charge coupled device) or CMOS
Purpose of RGB filters in digital cameras
Purpose of RGB filters in digital cameras
Separate light into red, green, and blue primary colours
Light reflection: white vs black in barcode readers
Light reflection: white vs black in barcode readers
White reflects most light; black absorbs light, reflects little
Power source for passive RFID tags
Power source for passive RFID tags
Electromagnetic power from the RFID reader
CMYK in laser printing stands for
CMYK in laser printing stands for
Cyan, Magenta, Yellow, Black (K)
Concentric circles on hard disk surface
Concentric circles on hard disk surface
Tracks
Hard disk platter spinning speed range (rpm)
Hard disk platter spinning speed range (rpm)
3600 to 12,500 revolutions per minute
Track structure on optical disks
Track structure on optical disks
One single continuous spiral track from middle to edge
How floating gate transistors retain data without power
How floating gate transistors retain data without power
Trap and store electrical charge in insulated floating gate
SSD access speed compared to HDD
SSD access speed compared to HDD
Up to 100 times faster