O is for Ohm automatic captions, checked for structure and key terms; corrections welcome [00:00:01.480] [unclear opening audio] [00:00:29.600] And some say you can still hear the blue smoke monster [00:00:35.320] howling in the night. [00:00:38.520] Ooh! Spooky story. [00:00:41.900] Very spooky, Mho. Thank you for sharing it. [00:00:45.320] Hey, how about we lighten the mood a little bit with some music? [00:00:50.000] I brought my guitar here. [00:00:51.820] Well, I've been working on a little song. [00:00:54.160] Have either of you heard of the scientist Georg Simon Ohm? [00:00:58.400] I haven't. [00:00:59.560] No. [00:01:00.640] Fantastic. [00:01:02.140] Adabot, throw me a G chord, please. [00:01:04.780] Will do. [00:01:09.940] Yeah. [00:01:12.720] Georg Simon Ohm was experimenting, [00:01:15.880] and he happened upon something very interesting. [00:01:18.880] He found that volts and currents are related to each other, but it's not like [00:01:23.840] they're cousins or sisters or brothers. [00:01:26.480] It's a rule that we now call Ohm's Law. [00:01:31.680] You can't break Ohm's Law because it's always true. [00:01:39.820] To find one value, you only need the other two. [00:01:46.300] Say you're working in a circuit and you need a certain current [00:01:50.300] 10 milliamps from a 9-volt supply [00:01:53.520] How many ohms will give you those amps? [00:01:57.280] You don't have to guess or take any chances [00:02:00.540] Just apply and rely on Ohm's law [00:02:05.940] You can't break Ohm's law [00:02:09.440] Because it's always true [00:02:13.800] Find one value, you only need the other two [00:02:21.480] Divide voltage by current to find the resistance [00:02:28.480] Resistance times current will tell you the volts [00:02:34.480] Divide voltage by resistance to find the current [00:02:40.880] Nice. [00:02:41.720] And that's all that we call Ohm's Law. [00:02:45.940] Wow. [00:02:47.480] So, you really can't break Ohm's Law? [00:02:51.020] No, you can't. [00:02:52.040] Like, not even sometimes? [00:02:53.380] It is always true. [00:02:55.100] And to find one of the values, I just need the other two. [00:02:58.360] You've got it! [00:03:01.000] You can't break Ohm's Law, because it's always true. [00:03:08.880] To find one value, you only need the other two. [00:03:47.120] We'll see you next time.