We made quiz questions to help you review the content in this episode! Find them on the free Crash Course App! Download it here for Apple Devices: apple.co/3d4eyZo Download it here for Android Devices: bit.ly/3TW06aP
Amazing how I sit 45 mins in a class and remember nothing and then spend 10 mins on this amazing video and understand everything so clearly! Love you CrashCourse
Lol I just realised that one of the little note things on the intro says 'Trigger Warning: Images may contain trigonometry'. The person who comes up with these jokes deserves to be knighted.
Its soooo good!!!! I remember when I found the PBS channels like Sci-show, CC, Brainscoop, Braincraft and the like and I was like :O This is to good to be true! and now after 4 years of being subscribed to all these incredible channels I am just super grateful :) Woo People Power And Being Awesome Because Every Thing Is Awesome!!! *breaks out into song*
Great video for an electrical engineering 101 audience. Kudos. I got my BSEE back in 2008, its a great degree to consider for anyone who finds this interesting and has strong math skills. I have never met and EE who has had trouble finding work or who didn't like their job.
I really wished that I had this kind of videos when I was in school. They are really good at explaining the theory, formulas and the actual effect in the real world. Keep doing a great job!!!
This taught me so much! Thank you!!! :) Also as a side note this host(whose new to me) is just fantastic!! You guys always get the most amazing people on your channel. Keep up the amazing work!
Ohh, can't wait till we get to Mesh, Nodal, and Superposition Analysis, Kirchhoff's Voltage and current law, Norton and Thevinin equivalent models, AC circuit analysis, complex impedance, Dissipation factor, and capacitive and inductive reactance! :D
Yeal LOL, of course I don't expect them to cover this stuff which is generally only covered in a university level physics or electrical engineering class, most of those things are mostly only relevant if you are an engineer anyway. But you gotta love all the jargon they use!
Bilb Ono you need a germanium diode (1N34A and 1N60 diodes are popular choices) AND high impedance high sensitivity headset or earphone. You can use normal ear buds if you also use a impedance matching transformer.
really one of your best videos to date. the mountain analogy was perfect. people use pipes to demostrate but it falls through in some concepts. this one was amazingly done!!
Hi, I don't quite understand the analogy- especially the part where she says that "additional branches will decrease the total resistance of the system and increase the amount of current through the entire circuit." Would you mind explaining it to me? :)
One of the great advantages of parallel circuits is that if one component stops working (so the circuit is broken), it only affects that branch of the circuit but the rest can carry on functioning normally. Imagine Christmas lights: you want to get the ones where if one light goes out, the others will still light up. Otherwise, finding the problem bulb is going to be a nightmare.
I am very grateful for crash course, since it is like a boost that makes it possible to juggle both sports and studies and remain a top achiever. THANK YOU CRASH COURSE.
you guys should do music theory (arrangement techniques, chords etc...) and art... and how to do magic and how to make cool things and connections or contraptions out of scrap wire!
"Remember how you add up all resistances to find an equivalent resistance from resistors in a series..." Someone really knows how to handle the "R" here..
*Sees electricity related video, turns one needless nitpick mode* 0:11 made me want to kill somebody... DC CANT PASS THROUGH A CAPACITOR *screams uncontrollably* 0:25 it actually provides an Electomotic force (EMF) that just happens to be measured in volts due to the base units being same (V=E/Q, we arrive at Kg m^2 s^-3 A^-1...) 1:34 and not really a Potential diffrence as that is used more to discrible the energy used... a battery is a source of EMF, it gives energy to the electrons, the charge. we say that one volt is the amount of energy the cell/battery suppplies to a charge of one columb (sp?) to drive it around a circuit... nitpicking aside. I loved the fluidity of the video! keep it up
Anas Malas capacitors let pass DC while it charges, once it reach it top voltage it opens the circuit. So we can say the animation is accurate if we say that the capacitor is still charging.
Sorry for this, but I would like to nitpick one of your point. Specifically, your point about DC characteristics of capacitors. The main argument that I would like to present is that it is a little more complicated than "DC cannot pass through a capacitor." To begin my nitpick, I would like to point out that the general behavior of a capacitor is to store charge. The capacitor stores potential electric energy, the EMF, or voltage (depending on how you want to look at it). At this point, I would like to admit that, yes, the steady-state DC characteristics of a capacitor is a break in the circuit, but to understand why, we need insight gained from looking at the transitive DC characteristics of a capacitor. If we assume a zero state on all components, at the beginning of the system's life (or as lim(t)->0), the voltage stored in a capacitor is 0V. As current flows through the circuit, this capacitor voltage will eventually settle on the voltage of the battery (assuming that the capacitor's design and material allows for the storing of the battery's voltage, when/if doing this experiment, please note the ratings on the capacitor, the capacitor's material design, and the way you're handling the capacitor). So what is the significance of this? Well, we can actually calculate the current moving through the resistor using a combination of Ohm's law and Kirchhoff's Voltage law. (This combination technique may also be called Mesh Analysis.) So at lim(t)->0, using Mesh Analysis, we can see that: V_total = 0 V_total = V_battery + V_resistor + V_capacitor -V_battery = V_resistor (Note that V_battery will be negative because it "supplies" power and rather than "expend" power.) I_resistor = V_resistor / R or I_resistor = -V_battery / R And this is a non-trivial, non-zero number. Your point is probably describing this: Let's say that the circuit reaches steady-state when 0
Great episode but I would like to dispute the title. DC Resistors and Batteries is misleading since one might think there is such a thing as a direct current resistor which doesn't exist. Resistors are just materials that resist the flow of current, regardless of the type of current flowing through it. The resistance of a resistor will not change because the circuit is an AC or DC circuit. Similarly, all batteries are DC since they have a constant voltage and provide a constant current. There are no such things as AC batteries; those would be wall outlets. A better title would have been just "Direct Current Circuits" or just "Resistors and Batteries."
A couple things to point out: Depending on the way you see it, you can just determine that DC resistors are not different from AC resistors without having to say that neither "exists" (i.e. a resistor connected to a DC system is a "DC resistor" and a resistor connected to an AC system is an "AC resistor". A weak, but not entirely invalid argument.) I would like to point out that "resistance" never changes because it is a scalar, real number that does not depend on any other factor. You probably meant to say "impedance" which is a complex variable that depends on some integral of t (transient analysis), s (Laplace transform), or j-omega (Fourier transform). Most standalone batteries are DC batteries. However, there at least definitely exist alternator circuits that can turn this DC power source into an AC signal using metastable circuits. Depending on your definition of "battery", they can potentially be considered "AC batteries." Wall outlets are not the only source of AC current. In fact, if you want to say that, then we would not only have to include power lines, but any arbitrary system connected to a step-down transformer. There are also some circuits that have the power to "pull" current and can alternate between these "push" and "pull" systems. (I think that Analog Devices has more information about these types of systems as it is featured on their Analog Discovery education platform...)
Better delivery by the professor.... Some of the previous entries were throwing out terminologies and formulas 100mph (with an acceleration of 2 miles per seconds squared)
You should do a video on ADHD. I have ADHD and it wasn't until recently when I started to do research, that I realized how much it affects me outside of school. I though ADHD just had to do with my ability to pay attention in class and my fidgeting. It affects so much more than that though. I would argue ADHD is the mental disorder least understood by a majority of people. Some people even think ADHD is a made up disorder, its purpose to sell prescription drugs. I know its been a while since your last psychology video, but I think education about ADHD is really important. Teach people what ALL the symptoms are, how likely it is to suffer from depression or anxiety because of it, and when people say "oh haha sorry I'm so ADHD" or "Sorry ADD moment" is really offensive. Its an everyday struggle, in fact while I'm writing this I am supposed to be working on an English assignment but I am too overwhelmed and cannot bring myself to do it.
How wrong you are. I'm not even going to begin the argument about the existence of ADHD but I want to address the second part of your comment. "don't put yourself in boxes to avoid becoming better" Acknowledging your mental illness and knowing how it affects your everyday life is not using it as an excuse. Knowing how to manage a problem that affects your life, first requires you to know what the problem is. THIS is why people need to know more about ADHD. This constant stamina behind mental illness saying that people blame it to get sympathy needs to stop.
Hank Green has (maybe) ADHD he uploaded a video on it today on vlogbrothers (him/John's other youtube channel) there might also might be a video on it on Crash Course Psychology or SciShow Psychology
I don't understand why people have trouble accepting the validity of mental illness. People have liver, kidney, or thyroid problems all the time. The brain is an organ too, and just like the others, it doesn't always function properly. I guess the misconception comes from the assumption that people have complete control over their brains. HA! Ok, then tell your brain to stop telling your heart to beat.
Then they'd have to explain what a breadboard is and how the rows and columns work along with how a power supply works. Better to just connect them directly since the goal is to just talk about the topic.
a simple graphic would easily explain how a breadboard works, and you could just take the reading from a power supply and say it "just is", or you could hook up a battery and use a multimeter
I agree with this. Understandably you're trying to compress the long story into the short version. I feel like there might be a more practical way to understand the physical workings of the circuit, that in turn clears up how each factor fits into each equation and how/why they're relevant.. I'm pretty uneducated on educating others but that's my $0.02. I absolutely love the crash course vids I can't get enough of these things so in any case thanks for everything y'all are doing and I am also happy to just watch again rewind ffwd and pause as necessary .. ⚽🏒
1:55 not a perfect example for Battery, Mobile consist of large number of components having thier specific resistances except that Battery resistance itself
I have no idea what she means when she says "no matter how rocky, start and end at the same elevation" at 6:10 could somebody please explain what she means
Fahd Saeed Fahd Saeed No matter how much water goes through each individual river, you’re still going to have the same amount of water at the end as what you started with. Just like how a different amount of current through each component leads to the same total current at the end as what you started with
You should have put a bit more time into the batteries internal resistance and the heat that generates as the current you pull from it increases. Should get people thinking about battery ESR early because it's important for safely working with batteries and is often overlooked. The experiment with the light bulbs for example would have been dangerous to perform with low resistance components like lithium batteries or LEDs. Exploding LEDs and batteries is a recipe for a bad time.
Were you guys forced to go with Prudential for financial support or was it done out of your own volition? If you really needed commercial support, it would have been better to promote products like breadboards or voltmeters. At least you didn't have to stoop so low as to accept Koch money. A little piece of advice for any one who's investing: go for index funds and nothing else. Anything else but an index fund needs to be managed. And when something's managed, it has exorbanent fees.
Actually, the battery's internal resistance does not necessarily dissipate power via John's law like you say here. while there are resistive losses in the battery, often what's really impeding the current is the chemical cells in the battery only being able to carry out the chemical reactions at a finite rate, limiting how many electrons per second can go through the circuit.
I don't think I can follow this series for fear of falling in love. Fortunately, the financial information at the end was like a cold shower. Maybe I'll take the risk again. But that face and her intelligence just beaming though. Oh dear, what is to become of me. Don't answer. Beautiful.
Why so many dislikes? This is like one of the dumbest things your learn in Certificate 2 Electrotech, and thats the lowest level of education, cert 2-4, diploma, advanced diploma, degree, honours,masters,doctorate
What you're describing (negative to positive) is the actual scientific way that current moves (electrons move), but for most people, the conventional positive to negative is easier to understand, and engineers use the conventional way.
Jcewazhere This has been covered well in comments on other CC Physics videos. Here is a short version. 1. The convention for electric charge, and thus for the polarity of current flow, was established by Benjamin Franklin 100 years or more before anyone had any inkling of electrons. 2. There are quite a few important systems, including the Ipad I am writing this on, in which positive charge carriers are very important. 3. Every physicist, chemist, electrical engineer and electronic technician in the world knows that electron flow is opposite to conventional current flow. It is a simple thing to learn. It might be the very simplest idea in all of electronics. Everything else about electronics is much more complex.
I would like to add that it also makes using Kirchhoff's laws easy as we can say that the "polarity" of a component is "negative" when the direction of the loop hits the "negative" side, goes through the component, and exits out the "positive" side and "polarity" is "positive" when the direction of the loop hits the "positive" side, goes through the component, and exits out the "negative" side. For a simple circuit with a single power source, it may seem like overkill, but sticking to a convention helps when dealing with multiple power sources and components that have non-trivial polarities.
The conventional way is used often not because it is easier to understand, or because of our mental bias for that direction, rather due to a lot of polarized components being designed with this convention in mind.
We made quiz questions to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: apple.co/3d4eyZo
Download it here for Android Devices: bit.ly/3TW06aP
Amazing how I sit 45 mins in a class and remember nothing and then spend 10 mins on this amazing video and understand everything so clearly! Love you CrashCourse
Lol I just realised that one of the little note things on the intro says 'Trigger Warning: Images may contain trigonometry'. The person who comes up with these jokes deserves to be knighted.
@Ksaver Srdar 1:06
Now I know why PBS is so important. Another great show.
Its soooo good!!!! I remember when I found the PBS channels like Sci-show, CC, Brainscoop, Braincraft and the like and I was like :O This is to good to be true! and now after 4 years of being subscribed to all these incredible channels I am just super grateful :) Woo People Power And Being Awesome Because Every Thing Is Awesome!!! *breaks out into song*
Great video for an electrical engineering 101 audience. Kudos.
I got my BSEE back in 2008, its a great degree to consider for anyone who finds this interesting and has strong math skills. I have never met and EE who has had trouble finding work or who didn't like their job.
I really wished that I had this kind of videos when I was in school. They are really good at explaining the theory, formulas and the actual effect in the real world. Keep doing a great job!!!
Congrats Crash Course on 5M subbies! Half way to 10M and your Diamond youtube play button.
Your videos really help me out! Thanks for making these!
This taught me so much! Thank you!!! :)
Also as a side note this host(whose new to me) is just fantastic!! You guys always get the most amazing people on your channel. Keep up the amazing work!
5:39 - ''what goes in must comes out''
brain: hold my beer
Good on Thought Cafe for adding a Halloween touch.
+
+ spooky :D
Watching this 2 weeks later I didn't make that connection somehow.
Wow! Congratulations on the 5 million subscribers! :D
How did she know that I was literally watching crash course for three hours for real. Spoopy :'D
Maybe its just a lucky guess?
OG this is the video I was searching for my lesson . Thanks
Wow! She's really bright!
The analogy with the flowing water was great. Thanks.
Ohh, can't wait till we get to Mesh, Nodal, and Superposition Analysis, Kirchhoff's Voltage and current law, Norton and Thevinin equivalent models, AC circuit analysis, complex impedance, Dissipation factor, and capacitive and inductive reactance! :D
Power Max /r/iamverysmart I doubt they will get that in depth on the subject sorry.
However don't stop me from letting you feel very smart by dropping physics terms.
Yeal LOL, of course I don't expect them to cover this stuff which is generally only covered in a university level physics or electrical engineering class, most of those things are mostly only relevant if you are an engineer anyway. But you gotta love all the jargon they use!
but how do i build a crystal set radio?
Bilb Ono you need a germanium diode (1N34A and 1N60 diodes are popular choices) AND high impedance high sensitivity headset or earphone. You can use normal ear buds if you also use a impedance matching transformer.
THANK YOU SO MUCH FOR HELPING ME PAST ME EXAMS
caution: phone temperature is proportional to score on AP exam.
Where's the microvave oven?
Thank you so much i wish they taught it this way in school ...
1:55-1:59= Must have been a Galaxy Note
Sideeq Mohammad 7
i see mutilation video
This was very useful - thank you CC.
'These bulbs won't be the only ones lighting up'
I think that was an indirect diss to my dumb brain
Positively illuminating.
The episode I have been waiting for!
Love you, Shini! Keep up the great work!
yay been waiting for this one!!
really one of your best videos to date. the mountain analogy was perfect. people use pipes to demostrate but it falls through in some concepts.
this one was amazingly done!!
Hi, I don't quite understand the analogy- especially the part where she says that "additional branches will decrease the total resistance of the system and increase the amount of current through the entire circuit." Would you mind explaining it to me? :)
One of the great advantages of parallel circuits is that if one component stops working (so the circuit is broken), it only affects that branch of the circuit but the rest can carry on functioning normally. Imagine Christmas lights: you want to get the ones where if one light goes out, the others will still light up. Otherwise, finding the problem bulb is going to be a nightmare.
I am very grateful for crash course, since it is like a boost that makes it possible to juggle both sports and studies and remain a top achiever. THANK YOU CRASH COURSE.
a carrot to you
THIS VIDEO HAS SAVED MY STRUGGLE OF FINDING OUT HOW PEOPLE GET THE ORIGINAL RESISTANCE😭☺️☺️☺️😄😄😄
I learn better just by watching these videos
you guys should do music theory (arrangement techniques, chords etc...) and art... and how to do magic and how to make cool things and connections or contraptions out of scrap wire!
well, I mean, why not? :P
This is so great. Thank you!!!
Great Video!!!
The sibilance is strong in this video. Still very informative and much appreciated.
"Remember how you add up all resistances to find an equivalent resistance from resistors in a series..."
Someone really knows how to handle the "R" here..
*Sees electricity related video, turns one needless nitpick mode*
0:11 made me want to kill somebody...
DC CANT PASS THROUGH A CAPACITOR *screams uncontrollably*
0:25 it actually provides an Electomotic force (EMF) that just happens to be measured in volts due to the base units being same (V=E/Q, we arrive at Kg m^2 s^-3 A^-1...)
1:34 and not really a Potential diffrence as that is used more to discrible the energy used... a battery is a source of EMF, it gives energy to the electrons, the charge. we say that one volt is the amount of energy the cell/battery suppplies to a charge of one columb (sp?) to drive it around a circuit...
nitpicking aside. I loved the fluidity of the video! keep it up
turns on* needless nitpick mode .*
RoarOfDamnation nitpicking on the nitpicker... Nice.
Anas Malas capacitors let pass DC while it charges, once it reach it top voltage it opens the circuit. So we can say the animation is accurate if we say that the capacitor is still charging.
right
Sorry for this, but I would like to nitpick one of your point. Specifically, your point about DC characteristics of capacitors. The main argument that I would like to present is that it is a little more complicated than "DC cannot pass through a capacitor."
To begin my nitpick, I would like to point out that the general behavior of a capacitor is to store charge. The capacitor stores potential electric energy, the EMF, or voltage (depending on how you want to look at it).
At this point, I would like to admit that, yes, the steady-state DC characteristics of a capacitor is a break in the circuit, but to understand why, we need insight gained from looking at the transitive DC characteristics of a capacitor.
If we assume a zero state on all components, at the beginning of the system's life (or as lim(t)->0), the voltage stored in a capacitor is 0V. As current flows through the circuit, this capacitor voltage will eventually settle on the voltage of the battery (assuming that the capacitor's design and material allows for the storing of the battery's voltage, when/if doing this experiment, please note the ratings on the capacitor, the capacitor's material design, and the way you're handling the capacitor).
So what is the significance of this? Well, we can actually calculate the current moving through the resistor using a combination of Ohm's law and Kirchhoff's Voltage law. (This combination technique may also be called Mesh Analysis.)
So at lim(t)->0, using Mesh Analysis, we can see that:
V_total = 0
V_total = V_battery + V_resistor + V_capacitor
-V_battery = V_resistor (Note that V_battery will be negative because it "supplies" power and rather than "expend" power.)
I_resistor = V_resistor / R or I_resistor = -V_battery / R
And this is a non-trivial, non-zero number.
Your point is probably describing this: Let's say that the circuit reaches steady-state when 0
Loving the RP.
Thanks for your videos!
this was so helpful
this was so helpful!
Great episode but I would like to dispute the title. DC Resistors and Batteries is misleading since one might think there is such a thing as a direct current resistor which doesn't exist. Resistors are just materials that resist the flow of current, regardless of the type of current flowing through it. The resistance of a resistor will not change because the circuit is an AC or DC circuit. Similarly, all batteries are DC since they have a constant voltage and provide a constant current. There are no such things as AC batteries; those would be wall outlets. A better title would have been just "Direct Current Circuits" or just "Resistors and Batteries."
A couple things to point out: Depending on the way you see it, you can just determine that DC resistors are not different from AC resistors without having to say that neither "exists" (i.e. a resistor connected to a DC system is a "DC resistor" and a resistor connected to an AC system is an "AC resistor". A weak, but not entirely invalid argument.)
I would like to point out that "resistance" never changes because it is a scalar, real number that does not depend on any other factor. You probably meant to say "impedance" which is a complex variable that depends on some integral of t (transient analysis), s (Laplace transform), or j-omega (Fourier transform).
Most standalone batteries are DC batteries. However, there at least definitely exist alternator circuits that can turn this DC power source into an AC signal using metastable circuits. Depending on your definition of "battery", they can potentially be considered "AC batteries."
Wall outlets are not the only source of AC current. In fact, if you want to say that, then we would not only have to include power lines, but any arbitrary system connected to a step-down transformer. There are also some circuits that have the power to "pull" current and can alternate between these "push" and "pull" systems. (I think that Analog Devices has more information about these types of systems as it is featured on their Analog Discovery education platform...)
1:56 oh I do watch Crash Course on my phone for 3 hours while still on the computer ha
Better delivery by the professor.... Some of the previous entries were throwing out terminologies and formulas 100mph (with an acceleration of 2 miles per seconds squared)
5:50 asymmetrical sleeve roll-up
i hate u,
Welcome to DC circuit fundamentals.
You should do a video on ADHD. I have ADHD and it wasn't until recently when I started to do research, that I realized how much it affects me outside of school. I though ADHD just had to do with my ability to pay attention in class and my fidgeting. It affects so much more than that though. I would argue ADHD is the mental disorder least understood by a majority of people. Some people even think ADHD is a made up disorder, its purpose to sell prescription drugs. I know its been a while since your last psychology video, but I think education about ADHD is really important. Teach people what ALL the symptoms are, how likely it is to suffer from depression or anxiety because of it, and when people say "oh haha sorry I'm so ADHD" or "Sorry ADD moment" is really offensive. Its an everyday struggle, in fact while I'm writing this I am supposed to be working on an English assignment but I am too overwhelmed and cannot bring myself to do it.
Update, finished the assignment, and my professor pushed its due date to next week. Yay?
Crystal Pasztor ADHD or ADD do not exist don't put yourself in boxes to avoid becoming better
How wrong you are.
I'm not even going to begin the argument about the existence of ADHD but I want to address the second part of your comment.
"don't put yourself in boxes to avoid becoming better"
Acknowledging your mental illness and knowing how it affects your everyday life is not using it as an excuse.
Knowing how to manage a problem that affects your life, first requires you to know what the problem is.
THIS is why people need to know more about ADHD.
This constant stamina behind mental illness saying that people blame it to get sympathy needs to stop.
Hank Green has (maybe) ADHD he uploaded a video on it today on vlogbrothers (him/John's other youtube channel) there might also might be a video on it on Crash Course Psychology or SciShow Psychology
I don't understand why people have trouble accepting the validity of mental illness. People have liver, kidney, or thyroid problems all the time. The brain is an organ too, and just like the others, it doesn't always function properly. I guess the misconception comes from the assumption that people have complete control over their brains. HA! Ok, then tell your brain to stop telling your heart to beat.
You're amazing....
hello CrashCourse
1:54 Pretty much looks like the Note 7...
Are youguys going to do a crash course on Atomic Spectra, Nucelar Physics or Dioeds?
The133448 they did a physics episode on nuclear physics
I PRAY TO THIS
I love your video
You are going a bit fast, its hard to keep up. Good explanation and pronunciation though
why not use a breadboard instead of that tape contraption
and a power supply to show it's drawing twice as much power
Then they'd have to explain what a breadboard is and how the rows and columns work along with how a power supply works. Better to just connect them directly since the goal is to just talk about the topic.
a simple graphic would easily explain how a breadboard works, and you could just take the reading from a power supply and say it "just is", or you could hook up a battery and use a multimeter
The wires make an easier simple demonstration.
it looks half-assed though
It's 11:20 PM. Tomorrow is my Y11 final exam for HL physics. And here I am, reviewing with crash course.
So what are expected Dc resistors and batteries
Some times your videos are to fast paced and difficult to take in
But are good nonetheless
I'm sure there's a metaphor to do with crash courses in there somewhere! :)
I agree with this. Understandably you're trying to compress the long story into the short version. I feel like there might be a more practical way to understand the physical workings of the circuit, that in turn clears up how each factor fits into each equation and how/why they're relevant.. I'm pretty uneducated on educating others but that's my $0.02. I absolutely love the crash course vids I can't get enough of these things so in any case thanks for everything y'all are doing and I am also happy to just watch again rewind ffwd and pause as necessary .. ⚽🏒
Moses Huf-Tirfe oops i meant ro make that public.. heh
Sometimes?
Not sure why I'm watching this. I'm a second year electronic engineering student
Why aren't you famous or something!!?
1:55 not a perfect example for Battery, Mobile consist of large number of components having thier specific resistances except that Battery resistance itself
Anyone else keep pausing to follow up on the math and other explanations?
After the video, the bulbs wont be the only things lighting up..LOLOL...I sure did light up on that
I have no idea what she means when she says "no matter how rocky, start and end at the same elevation" at 6:10
could somebody please explain what she means
Fahd Saeed Fahd Saeed No matter how much water goes through each individual river, you’re still going to have the same amount of water at the end as what you started with. Just like how a different amount of current through each component leads to the same total current at the end as what you started with
@@Killlogun ohh thanks so much, I was scratching my head for a while trying to figure out
can someone tell me why is the voltage said to drop??!!!
last time I was this early, I needed a new joke.....
Thankyou
Please make worksheets!
At 4:57, those lightbulbs are not in series lol
why not?
Welcome to the early crew.
Literally have to put it on 0.75x speed just to understand this.
Outlets in my home are done in series, no parallel, for each circuit.
Aren't light bulbs textbook example of non-linear resistors meaning you can't just use Ohm's law without asterisks?
You should have put a bit more time into the batteries internal resistance and the heat that generates as the current you pull from it increases. Should get people thinking about battery ESR early because it's important for safely working with batteries and is often overlooked.
The experiment with the light bulbs for example would have been dangerous to perform with low resistance components like lithium batteries or LEDs. Exploding LEDs and batteries is a recipe for a bad time.
Were you guys forced to go with Prudential for financial support or was it done out of your own volition? If you really needed commercial support, it would have been better to promote products like breadboards or voltmeters. At least you didn't have to stoop so low as to accept Koch money. A little piece of advice for any one who's investing: go for index funds and nothing else. Anything else but an index fund needs to be managed. And when something's managed, it has exorbanent fees.
ita6aki I bet you are very popular with the ladies.
oopoo64 ha! got eeemmm
I just noticed the bloody arm sticking up from the ground on the waterfall scene
now do an episode on AC
kinda wish they use values rather than variables like give the battery 500mah and see how much the total energy the bulbs use on both circuits.
hey guys its scarce here
does your transcript have ANY FULL STOPS?
Actually, the battery's internal resistance does not necessarily dissipate power via John's law like you say here. while there are resistive losses in the battery, often what's really impeding the current is the chemical cells in the battery only being able to carry out the chemical reactions at a finite rate, limiting how many electrons per second can go through the circuit.
I don't think I can follow this series for fear of falling in love. Fortunately, the financial information at the end was like a cold shower. Maybe I'll take the risk again. But that face and her intelligence just beaming though. Oh dear, what is to become of me. Don't answer. Beautiful.
Interesting.
Why so many dislikes? This is like one of the dumbest things your learn in Certificate 2 Electrotech, and thats the lowest level of education, cert 2-4, diploma, advanced diploma, degree, honours,masters,doctorate
The river analogy was very helpful!
ISTEZ AHMAD EL HAJJ I SEE YOU - M.I.
Shouldn't the diagram be flowing in the opposite direction? Out of the negative side of the battery and into the positive side.
What you're describing (negative to positive) is the actual scientific way that current moves (electrons move), but for most people, the conventional positive to negative is easier to understand, and engineers use the conventional way.
Jcewazhere This has been covered well in comments on other CC Physics videos. Here is a short version. 1. The convention for electric charge, and thus for the polarity of current flow, was established by Benjamin Franklin 100 years or more before anyone had any inkling of electrons. 2. There are quite a few important systems, including the Ipad I am writing this on, in which positive charge carriers are very important. 3. Every physicist, chemist, electrical engineer and electronic technician in the world knows that electron flow is opposite to conventional current flow. It is a simple thing to learn. It might be the very simplest idea in all of electronics. Everything else about electronics is much more complex.
I would like to add that it also makes using Kirchhoff's laws easy as we can say that the "polarity" of a component is "negative" when the direction of the loop hits the "negative" side, goes through the component, and exits out the "positive" side and "polarity" is "positive" when the direction of the loop hits the "positive" side, goes through the component, and exits out the "negative" side.
For a simple circuit with a single power source, it may seem like overkill, but sticking to a convention helps when dealing with multiple power sources and components that have non-trivial polarities.
The conventional way is used often not because it is easier to understand, or because of our mental bias for that direction, rather due to a lot of polarized components being designed with this convention in mind.
Connect your things in your home using series connection, that would be LOL
*scrolls down to comments to see if there are note 7 jokes*
Hey what's up guys scarce here
action-gap? sounds like a marketing term.
1:01 EXPELLIARMUS!!
I mean, Lumos! *grins sheepishly*
needs thought bubble
kia ap all dc resister ko 1 sath dekha kar detail daysagti hai
Transistor
Wow your videos are so good. Thanks for making them. :)
How this guy has 5 million subs??
Because its one of the best youtube channels!
wat?
Because its like pure gold if gold was nourishing, like all the ATP absorbed by the brain. mmmmm brains.
just search up achievements of John and Hank Green
7.3M now
They should've used U in the formulas instead of V..
Why reupload?
I accidentally uploaded the version without all the sound design! Not one of my finer moments.
-Nicole
Ah, Thank you for the explanation!
relly #fail$$$$gone
pefect spelling by me I ment really
I mean meant