QUESTION IMAGE
Question
which type of touch screen has a laminate applied over the glass that conducts electricity, which flows to the finger or stylus when touched?
resistive
capacitive
infrared
surface acoustic wave (saw)
Capacitive touchscreens use a conductive layer (like indium tin oxide) on the glass. When a finger (which is conductive) touches, it changes the capacitance (electric field), and the electricity flows to the finger as it's part of the capacitive coupling. Resistive touchscreens work by pressure causing two layers to make contact. Infrared uses light beams. Surface acoustic wave (SAW) uses ultrasonic waves.
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B. Capacitive