This chapter presents some practice in the use of elementary functions in selected basic electrical engineering problems. It provides some simple signal functions that computer Engineers will encounter in future engineering analysis and design problems. In the SI units used by electrical engineers, the unit of power is the Watt. However, in a number of applications, it is convenient to express the power as a ratio of its value to a reference value. An ideal capacitor can be loosely defined as two metallic plates separated by an insulator. If a potential is established between the plates, for example, through the means of connecting the two plates to the different terminals of a battery, the plates will be charged by equal and opposite charges, with the battery serving as a pump to move the charges around.