The computer's keyboards make use of capacitors at the base of their keys (as shown in the…
Physics20251 markDrawing
The computer's keyboards make use of capacitors at the base of their keys (as shown in the diagram). Each key is connected to a movable plate, which represents one side of the capacitor. The fixed plate on the keyboard's bottom represents the capacitor's other side. External electronic circuits recognize each key by its capacitance when pressed.
Sketch a graph showing the variation of electric field $E$ between the plates with distance $d$ from the first plate till the second plate.
Figure 81
Answer
Answer
Official answer key
Graph: E (y-axis) against d (x-axis, from 0 to the second plate) is a horizontal straight line, as the electric field between the plates is uniform.
Electrostatic Potential, Potential Energy and Capacitance
