Find the change in capacitance that is detected by computer

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Reference no: EM13527703

One common kind of computer keyboard is based on the idea of capacitance. Each key is mounted on one end of a plunger, the other end of the plunger being attached to a movable plate. The movable plate is separated from a fixed plate, the two plates forming a capacitor. When the key is pressed, the movable plate is pushed closer to the fixed plate and the capacitance increases. Electronic circuitry enables the computer to detect the change in capacitance, thereby recognizing which key has been pressed. The separation of the plates is normally 5x10-3m but decreases to 0.150x10-3m when the key is pressed. The plate area is 9.50x10-5 m2 and the capacitor is filled with a material whose dielectric constant is 3.50. Determine the change in capacitance that is detected by the computer.

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