Physical Science 6.3b - DC and AC

Physical Science. Direct Current and Alternating Current. From the Physical Science course by Derek Owens.

Category:

Education

Tags:

• Physical Science
• direct current
• alternating current
• DC
• AC
• current
• Derek Owens
• Distance Learning

[GSubman]

The electrons don't alternate from one direction to another. This explanation of AC is completely erroneous,The first electrons get charged and expand and contracts. This expansion and contraction fo the elctron gets passed on to the elctron beside it and and that is how AC works. The electrons don't move for a certain period of time in one direction and then don't reverse their direction after some time.

[derekowens]

@GSubman The electrons don't expand and contract. And they do in fact move through the wire. In reality they bounce around inside the wire, ricocheting off of the atoms, but the overall drift velocity is in one direction until the current flow reversed. The expansion and contraction you are talking about would accurately describe the propagation of a sound wave.

[barthez135]

current flow from negative to possitive you wank

[derekowens]

@barthez135 It depends on whether you are talking about conventional current or electron flow. You can design circuits either way. The difference in the two is a source of perennial confusion to science students the world over.

[SuperTariqanwar]

sir can you tell me what is volts actually i mean it is the S.I unit of voltage which is the difference between the higher potential energy and the lower potential energy or anything else?

[dreamerkeii]

thank you so muuuuchh... you helped me understand more about this.. :) we have a test tomorrow haha

[Flacorcuera]

"Not hertz like, ouch that hurts" hahahahahhahahahahahaha your funny!!!

[SilyBily32]

@derekowens It is unclear what form of energy this potential energy is converted to. Is it be electrical energy because devices use direct current? I would imagine that the alternating current would arrive at your house and some sort of device would be needed to convert the _____ energy released so that it can be used by, say, a toaster. I am not seeing how the back-and-forth movement of electrons would be used to light a lamp.

[luvgory]

how does the electric company make the electrons move in that way???

[sharpclawster]

what font is that ?

[MrReadthisoutloud]

@barthez135 Little knowledge is a dangerous thing, think before u talk