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Term1 Year10 Practice Set3
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Why smart phones have a shorter battery life?
They combine many features, so they use more power and have to be charged more regularly
When reading data, read/write head changes magnetic field to electric current. True or False
True
There are 3 types of storage devices. Hdd, SSd and ____.
Optical disk drives
State two actuators (control devices).
piston, valve, heater, cooler, motor
State two features of data projectors
light bulbs, resolution, zooming, portability
Dot matric printers are also called impact printers because they have to hit paper through a ribbon of ink.
True
State one benefit of using sensors.
Can place in remote areas, always working, less human error, sense things that humans cant
State two advantages of biometric scanners.
can't be forgotten, harder to trick or confuse them, faster, not restricted by language.
fingerprint recognition, facial recognition, voice recognition and iris recognition are _____.
Biometric scanners
How resistive touch screens work?
Pressure causes two layers under screen to touch and make a connection.
capacitive touch screen has layer of capacitive material that conducts charge from finger. True or False.
True
State two types of touch screen.
capacitive and resistive
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