Lesson Summary

The following points summarize the main elements of this lesson:

Ohm's Law is the basic formula for power calculations.
There are two types of power: alternating current (AC) and direct current (DC).
A multimeter is used to measure volts, amps, continuity, and resistance.
A computer technician should be familiar with the various electronic components found on a power-supply circuit board.
In a new installation, a computer technician should never assume that the power supplied in the wall outlets is correct. Always test and be sure.
Be careful with large electrolytic capacitors. They can store electrical charges and must be discharged before it is safe to work with them.