Some computer keyboards are based on the idea of capacitance. Each key is mounted on one end of a plunger, the other end being attached to a movable metal plate. The movable plate and the fixed plate form a capacitor. When the key is pressed, the capacitance increases. The change in capacitance is detected, thereby recognizing the key which has been pressed. The separation between the plates is 5.00 mm, but is reduced to 0.150 mm when a key is pressed. The plate area is 9.50 x 105 m²and the capacitor is filled with a material whose dielectric constant is 3.50. Determine the change in capacitance detected by the computer.

Some computer keyboards are based on the idea of capacitance. Each key is mounted on one end of a plunger, the other end being attached to a movable metal plate. The movable plate and the fixed plate form a capacitor. When the key is pressed, the capacitance increases. The change in capacitance is detected, thereby recognizing the key which has been pressed. The separation between the plates is 5.00 mm, but is reduced to 0.150 mm when a key is pressed. The plate area is 9.50 x 105 m²and the capacitor is filled with a material whose dielectric constant is 3.50. Determine the change in capacitance detected by the computer.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

Some computer keyboards are based on the idea of capacitance. Each
key is mounted on one end of a plunger, the other end being attached to a
movable metal plate. The movable plate and the fixed plate form a
capacitor. When the key is pressed, the capacitance increases. The
change in capacitance is detected, thereby recognizing the key which has
been pressed. The separation between the plates is 5.00 mm, but is
reduced to 0.150 mm when a key is pressed. The plate area is 9.50 x 105
m?and the capacitor is filled with a material whose dielectric constant is
3.50. Determine the change in capacitance detected by the computer.

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