![]() ![]() Keep picking these kids up and putting them back over here, pushing them against gravity. And just like over here, forĬontinuous motion of the kids, someone needs to continuously Have an electric current motion of charges in this direction. Terminal of the battery pushes these charges away from them and the negative terminal of the battery pulls these charges towards it. So we can focus more on theĬoncept over here easily, if we just assume that these are positive charges, all right? So, if we think of themĪs positive charges, we can now see the positive Of electrons would be, might be slightly annoying. That's how we chose theĬonvention, isn't it? So thinking in terms The only reason being, theĭirection of the current is the direction in which Now, for simplicity, what we will do is we'll assume that theseĪre not negative electrons, but we'll assume them to be That one side of the battery is positive, the other side is negative. Just like how gravity pushes these kids, we need an electric force These wires are all metals and metals have loads of electrons, which are negatively charged particles, free to move inside of them. ![]() There are charges present everywhere in the wire already. Who are on the slide, what's making them move from here to here? I'm pretty sure you know theĪnswer to this, it's gravity. So let's start lookingĪt this a little deeper. And so we'll keep this picture in our mind as we try and understand how to produce a continuous current of charges. And so, there'll be aĬontinuous current of kids. If, as the kids slide down, someone could pick them up and put them back at the top continuously, then I'm pretty sure you can guess, there'll be a continuous Picture of happy kids playing on a slide. Gonna answer in this video is how do we setup a current in these wires? And we'll also learn what a battery does and what does voltage really mean? And to do all of this, let's start by thinking of an analogy. If we have a bulb connected to a bunch of wires, the question that we're If I'm wrong do let me know (this is just on my understanding of the concept) Remember Current is the same throughout the circuit, only the potential to do work by each charge changes as it moves between the terminals. It's similar to you having more energy after eating food, after you eat you have the potential to do more work(consider running.not a great idea ideally but I hope you get what I mean) than after an intense workout. ![]() Similarly, the potential at the +ve terminal has more potential to do work (that is why the bulb lights up) Potential at a point is the potential to do the work, here work isn't already done.įor example, let's go back to the slide scenario-the kid at the top has more potential or more capability to do work (he hasn't done any work yet) when compared to the the child at the bottom who has already done work Potential at a point is the work done in a unit charge from infinity to that point ![]()
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