Many computer keyboard buttons are constructed of capacitors as shown in the figure. When a key is pushed down, the soft insulator between the movable plate and the fixed plate is compressed. When the key is pressed, what happens to the capacitance?
(a) It increases.
(b) It decreases.
(c) It changes in a way you cannot determine because the electric circuit connected to the keyboard button may cause a change in the potential difference V.
