How far must the key be depressed for a keystroke to be

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Reference no: EM13641305

The parallel-plate capacitor used on each key of a computer keypad is a square 0.5 cm on a side. Between the plates is a dielectric with ? = 4.4. When the key is in the "up" position, the plate separation is 0.74 mm. How far must the key be depressed for a keystroke to be registered, which happens when the capacitance increases by 3.9 pF?

Reference no: EM13641305

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