what are some things that use ac instead of dc electricity. Why do some things need ac and some need dc? Also, how are the currents changed to form ac or dc?thank you
pretty much all electrical appliances use DC current, its easier to transport AC current through the power lines. When it gets to the appliance its converted, if you need more information you should just google the difference and uses of AC and DC electricity its all there
That my friend is a big *** question. (I'll keep it simple) AC =Alternating Current so voltage goes 0v 110v 0v -110v around 60 times a second. DC=Direct Current so voltage goes 12v............ forever (or till your battery goes flat) First AC is far easier to generate, Even cars generate AC and convert it to DC. Cars use DC because you can store it in a battery, which in turn means you can use it to start your car. The sockets in your wall are AC most appliances that plug into the wall use AC, computers and electronics generally convert AC to DC because that's what electronic components need to work. Transformers need AC to work, (I wont go into why), and the transmission networks use very high voltages, like 110,000 volts, then convert it with transformers for use by the consumer AC motors are also far more simple and easier to produce. So most fridges, washers, dishwashers use AC for their motors. they may also convert some electricity to DC for the electronics. AC is converted to DC with a bridge rectifier, which is made up of diodes, which are essentially a one way valve for electricity. DC is generally used for low voltages and AC for higher because AC is easier to switch off than DC. When you switch something off it makes arcs (electrical spark), once an arc has started it is hard to stop, for example an arc might be capable of starting at 1mm but wont stop till the gap is 3mm. So with that, if a switch opens to 2mm a DC arc wont stop, but because AC passes through 0v 120 times a second the arc stops and cant start again. I'll leave it at. There is loads more to it, and some of what I have written is very simplified. If you're truly interested perhaps you should consider becoming an electrician
