 10th okay, so more or less concepts from class 10th okay, but is what the kinds of the kind of problems you are solving or you are dealing with okay, so the depth of understanding should be more okay and then of course it will not be exactly like what you have done in class 10, but then you know that series parallel connection and all that okay, so all that will be in this chapter, this chapter is a very easy chapter okay, there are not many concepts fine, so what happens is that students take it lightly, so they will have easy ones at the end also and that end never comes fine, so follow the when I'm doing this do this chapter completed it once you once if you complete this chapter this chapter is guarantee you marks, chapters like modern physics and this chapter so in fact they guarantee you marks fine, mechanics huge in fact so you can't just ignore entire mechanics but what I'm telling you you will never be able to master these topics fine, so it may happen that in order to master these topics you keep on spending more in mechanics how you should do it okay because these chapters you may not be able to solve a lot of questions in exam and just to master these topics which are very difficult you're leaving out so simple that you'll be able to complete it in one day or two days before the exam you have to give good and this chapter there is not much of a difference between you know the kind of problem you get in school kind of problem you get in J mains in fact advance also there will not be too much of variation but if you see the J advance question there's a huge gap fine so it will take a lot of time for you to master up to that level fine so so that you'll be able to understand all the guarantees this chapter guarantees the full marks okay so let's see how this chapter is affecting the section is very similar to kinetic theory of gas for electron motion inside the similarly electrons can move sim in a similar fashion inside a kind of energy fine okay we go into micro factors as in how current depends on how many free electrons it has okay and how current depends on with what velocity electron is moving so all that you'll study here okay next section okay no no not okay in fact the seventy to eighty percent of numerical will be section okay application of whatever concepts you have learned okay so you'll be two instruments fine not fine so you might right so we'll be okay and this everybody knows it's not a secret it's an open secret fine so this the person they'll pick person from the end a small section but they know that to casual student would not have studied this fine so we need till and no there's a lot more to it okay and in this that will study later okay okay so first section so when fine if so we'll be talking about that so during its motion up so you'll see that there is net net movement forward why because the battery is trying to push it now it is the movement is that also clear okay now then things will be very simple okay just like you have charged which is flowing suppose it revolves around a circle of find out the current due to this this so electron 2 pi r by v no