A is for Ampere

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

[00:00:00.000] Adabot, Billie,
[00:00:05.600] Connie, Ruby, Mho,
[00:00:10.740] Gus, Cappy,
[00:00:16.360] Circuit Playground.
[00:00:48.260] uh oh did i break something
[00:00:54.600] looks like you tripped the circuit breaker Adabot wait who did i trip no no the
[00:00:58.780] circuit breaker
[00:00:59.260] isn't a person, it's a device in that box over there. The circuit breaker turns off
[00:01:02.900] all the electricity when we draw too much electrical current and it's also something
[00:01:07.860] only a grown-up should touch. Committed to memory. Wow, powering all my stuff. Must use
[00:01:14.000] a lot of current. That's right and we measure electrical current in amperes. Huh, why do
[00:01:18.960] we call it that? The ampere is named after the scientist, Mr. André-Marie Ampère.
[00:01:24.620] Accessing
[00:01:25.100] database. André-Marie
[00:01:30.740] Ampère, a French scientist from the 1800s. That's right and Mr. Ampère was
[00:01:35.280] very curious about how electricity works. Curious? Like me? This is true. And he
[00:01:40.580] conducted many
[00:01:41.240] experiments to learn about electricity.
[00:01:48.440] The results of his experiments showed Mr. Ampère
[00:01:51.080] that electricity is created by the movement of many teeny objects which are so small we
[00:01:56.580] can't even see them.
[00:02:01.920] Electrodynamic molecules?
[00:02:03.800] Nowadays, we call these teeny objects electrons and when electrons
[00:02:09.660] move we call that electrical
[00:02:11.160] current.
[00:02:15.700] Makes sense to me.
[00:02:23.200] Oh, now I get it Ladyada, but how do we measure amperes?
[00:02:27.560] That's easy. We use a multimeter.
[00:02:30.680] Oh, I wish I had one of those.
[00:02:36.180] In this circuit, electrons flow from one end of the battery, through the LED,
[00:02:40.400] and then back to the other end of the battery.
[00:02:44.160] By sending the current through a multimeter,
[00:02:46.380] we're able to measure the amount of electrons flowing through.
[00:02:54.800] So this LED is using...
[00:02:56.820] 0.05 amperes.
[00:02:59.760] Correct.
[00:03:01.980] I wish I could see electrons move.
[00:03:04.480] Well, you may not be able to see every single electron,
[00:03:07.320] but you can see the effects of electrical current.
[00:03:09.720] Really? How do we do that?
[00:03:11.920] Well, you can see it when your boombox makes sound.
[00:03:14.640] Or when your toaster heats up.
[00:03:16.840] And you can feel it when your blow dryer blows hot air at you.
[00:03:20.180] I get it. Electrical current makes electricity go.
[00:03:23.400] Those electrons are amazing.
[00:03:25.760] That's right, Adabot.
[00:03:27.220] Hey, you know, you don't have any hair, right?
[00:03:30.260] What?
[00:03:31.320] [unclear speech]
[00:03:46.180] We'll see you next time.