o is for ohm

automatic captions, checked for structure and key terms; corrections welcome.

0:01[unclear opening audio]

0:29And some say you can still hear the blue smoke monster

0:35howling in the night.

0:38Ooh! Spooky story.

0:41Very spooky, Mho. Thank you for sharing it.

0:45Hey, how about we lighten the mood a little bit with some music?

0:50I brought my guitar here.

0:51Well, I've been working on a little song.

0:54Have either of you heard of the scientist Georg Simon Ohm?

0:58I haven't.

0:59No.

1:00Fantastic.

1:02Adabot, throw me a G chord, please.

1:04Will do.

1:09Yeah.

1:12Georg Simon Ohm was experimenting,

1:15and he happened upon something very interesting.

1:18He found that volts and currents are related to each other, but it's not like

1:23they're cousins or sisters or brothers.

1:26It's a rule that we now call Ohm's Law.

1:31You can't break Ohm's Law because it's always true.

1:39To find one value, you only need the other two.

1:46Say you're working in a circuit and you need a certain current

1:5010 milliamps from a 9-volt supply

1:53How many ohms will give you those amps?

1:57You don't have to guess or take any chances

2:00Just apply and rely on Ohm's law

2:05You can't break Ohm's law

2:09Because it's always true

2:13Find one value, you only need the other two

2:21Divide voltage by current to find the resistance

2:28Resistance times current will tell you the volts

2:34Divide voltage by resistance to find the current

2:40Nice.

2:41And that's all that we call Ohm's Law.

2:45Wow.

2:47So, you really can't break Ohm's Law?

2:51No, you can't.

2:52Like, not even sometimes?

2:53It is always true.

2:55And to find one of the values, I just need the other two.

2:58You've got it!

3:01You can't break Ohm's Law, because it's always true.

3:08To find one value, you only need the other two.

3:47We'll see you next time.