O-LevelComputer ScienceHardware2210/12 · May/June 2019 · Q104 Marks
Remy has a mobile device that has a capacitive touch screen. Describe how the capacitive touch screen registers Remy's touch.
- Remy has a mobile device that has a capacitive touch screen. Describe how the capacitive touch screen registers Remy's touch.[4]
Mark scheme
Marking points from the official mark scheme (May/June 2019). The mark or mark type is shown in brackets.
- [4] Four from: Electrical field/charge is spread across the screen Sensors are located around the screen // sensors are used to read the electric field When finger touches screen, the charge/ is transferred to the user as it is affected by the conductivity of another object Coordinates of touch determined/calculated/measured
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