Capacitance

This week we learned about capacitance. Capacitance is the electrical energy stored in the short term. Capacitance has a very high electric potential with a little charge. Capacitance is found between two charged plates. The material between that is activated by the capacitance is the dielectric or conductive material. The units for capacitance is farads (F),  which is charge or coulombs (C) divided by volts (V). To find capacitance you multiply the epsilon, or permittivity of materials between plates, by the area of the plates, then divide the product by the distance between the plates. Epsilon is a constant number which is basically air resistance, 8.85x10^-12. I remember capacitance because an easy example that uses capacitance is a computer or laptop keyboard. Under the keys there are capacitors that are programed to display the letter or symbol on screen. So when we push down on the key we activate the conductive material or dielectric which sends a charged message to the computer to display the letter or symbol. Even computers know their physics!