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How do capacitive fingerprint scanners differ from the optical ones?

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Варианты ответа
The capacitors use light sensors
The capacitors don't generate an image of the ridges and valleys that make up a fingerprint
The capacitors use electrical current(Верный ответ)
The capacitors have a CCD camera
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Like optical scanners, capacitive fingerprint scanners generate an image of the ridges and valleys that make up a fingerprint.
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