Capacitance is defined as the ability to store an electric charge and is symbolized by the capital letter C. Capacitance (C), measured in farads, is equal to the amount of charge (Q) that can be stored in a device or capacitor divided by the voltage (E) applied across the device or capacitor plates when the charge was stored. Equation (1-10) is the mathematical representation for capacitance.

Summary

The important information contained in this chapter is summarized below.

Electrical Units Summary

METHODS OF PRODUCING VOLTAGE (ELECTRICITY)

This section provides information on the following methods of producing electricity:

Electrochemistry Static (friction) Induction (magnetism) Piezoelectric (pressure) Thermal (heat)

Light

Thermionic emission

EO 1.5

DESCRIBE how the following methods produce a voltage:

a. Electrochemistry

b. Static electricity

c. Magnetic induction

d. Piezoelectric effect

e. Thermoelectricity

f. Photoelectric effect

g. Thermionic emission