From the course: Help Desk Handbook for End Users: PC Basics, Hardware, Operating Systems, and Applications
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Power supplies
From the course: Help Desk Handbook for End Users: PC Basics, Hardware, Operating Systems, and Applications
Power supplies
- This probably won't come as a shock but computing devices require electricity. Turn off the juice and they simply fail. The freaky thing about electricity is that we have two choices. We could therefore title this episode Edison versus Tesla, fight! Too obscure? Here's the point. Tesla won back in the day in the entire electric grid of the United States, mostly, runs on a style of electricity called alternating current or AC. When you plug a lamp into a wall socket and turn it on, the light flows forth because of AC electricity, assuming you put the bulb in, of course. Computing devices on the other hand run on the other kind of electricity called direct current or DC. This brings up several points. First, batteries provide DC power, so all of the portable computing devices such as smartphones, tablets, laptop computers and so forth, rely on batteries for power. Second, all devices need some sort of power converter. Smaller devices have a converter in the form of a little wall wart…
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