From the course: CompTIA IT Fundamentals (FC0-U61) Cert Prep 1: Computer Basics, Hardware, and Operating Systems
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Power supplies
From the course: CompTIA IT Fundamentals (FC0-U61) Cert Prep 1: Computer Basics, Hardware, and Operating Systems
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, and 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…
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