Many computer keyboard buttons are constructed of capacitors, as shown in the figure below. When a key is pushed down, the soft insulator between the movable plate and the fixed plate is compressed. When the key is pressed, the capacitance (a) increases
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Many computer keyboard buttons are constructed of
capacitors, as shown in the figure below. When a key
is pushed down, the soft insulator between the
movable plate and the fixed plate is compressed.
When the key is pressed, the capacitance
(a) increases
(b) decreases
(c) changes in a way that we cannot determine because the complicated electric circuit connected to the keyboard button may cause a changeinΔV.
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