Lesson 1: Power
Computers run on electrical energy. Without it, a computer might as well be a paperweight. Because every component of a computer needs power to run (whether plugged into a wall outlet or a battery), a computer professional must understand the basic principles that govern electricity and electrical energy. This tutorial introduces you to these principles.
The energy or power to drive a computer is derived from electricity. Whether it uses 110 volts alternating current (AC), the U.S. standard, 220 volts AC, the European standard, or direct current (DC) from a battery, a computer is useless without a steady, reliable source of power. When we encounter problems with a computer, it is crucial for us to be able to test the entire power system. This lesson covers the basics of power and electricity.
After this lesson, you will be able to:
Estimated lesson time: 45 minutes
- Explain the difference between electricity and electrical energy.
- Define the terms used to measure electrical energy.
- Identify basic electric and electronic components.
- Perform basic and advanced electrical energy tests.