Lesson 1: Power

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:

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.

Estimated lesson time: 45 minutes

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