Part A In one type of computer keyboard, each koy holds a small motal plate that serves as one plate of a parallel-plate, air-filled capacitor. When the key is depressed, the plate separation decreases and the Calculate tha capacitance before the key is depressed. capacitance increases. Electronic circuitry defects Express your answer in farads. the change in capacitance and thus detects that the key has been pressed. In one particular keyboard, the area of each metal plate is 45.0 mm , and the separation between the plates is 0.730 mmm before IVO the key is depressed. Submit Request Answer Part B If the circuitry can detect a change in capacitance of 0.210 pF. how far must the key be depressed before the circuitry detects its depression? Express your answer in millimeters. ALd +0 ? Submit Request