Physics 12.5.2a - DC and AC

[will34uk]

Would you not need to convert it to DC in a fan else the motor would go back and forth??

[derekowens]

@will34uk Correct! There are AC motors, but I cannot explain the details. Most electronic devices in your home use DC current, and they have a transformer in them that converts the AC from the wall to DC at the correct voltage.

[saurabhinorange]

i have an question how does this back forth movement actually help ?

[derekowens]

@saurabhinorange The alternating current is much easier to produce, and much MUCH cheaper to transmit long distances.

[captaindory]

This is the basic question I haven't gotten an answer to. If the current goes back and forth how does it get anywhere? I know this is really basic, but I don't understand the concept of going back and forth if they are supposed to be flowing.

THank you

[derekowens]

@captaindory The electrons don't actually go anywhere. They just move one direction for 1/60 of a second, and then the opposite direction. So they just shake back and forth, but they deliver some energy with each of these motions, so energy gets transferred from the power plant to your house.

[sayedwaqarh]

how can equal dc to ac like if 24v dc to how 24-0-24

[Na5iR1]

WOW...you make things so easy to understand...thx from Australia

[bradmottram]

nz is 230v at 50Hz

[SumbulAndleeb]

what about mobiles....their adaptors are able to convert the power or sumthing????

[coolnitroguy]

@SumbulAndleeb Yes mobile phone adapter work the similar way like the laptop adapter illustrated in the video.

[SumbulAndleeb]

u said electrons move from the socket to the fan n back but my phy teacher say that its the flow of charge ..... hw can charge flow??

[coolnitroguy]

@SumbulAndleeb Current = Rate of flow of electric charge.

I = Q / t where : Q = Charge , t = time , I = current

[falkekimbo]

Which graphics tablet do you use? And can you make videos on theoratical physics? For example: Lagrangian, Hamiltonian, Poissonbrackets... . Thanks

[xenialz]

thanks so much man your way better than my teacher

[salman265]

thanks man, i have an exam tommorow, this sure helped

[virusavatar]

THANK YOU SO MUCH!!!! I didn't know physics was so easy! :-D

[domyaska]

very kind from you sharing this videos!!!thanks a lot ...really!! excellent explanation....grazie e saluti dal sud d'italia