So today onward we will start a new chapter This is a major chapter of our syllabus of class 12th We will start with CURRENT ELECTRICITY OK Now in this chapter we are going to study about the phenomenon related to the motion of charges When charges are flowing or when charges are in motion […]

## 1. Physics Lecture of 11th Class | Current Electricity | Electric Current | by Ashish Arora (GA)

dear students lets start with the topic of electric current. and, in your early classes you might have studied about the basic definition of current in which, we write that. rate of flow of charge. through. any cross section. of a conductor. in which current is flowing obviously we are talking about. is called. electric […]

## 5. Physics | Current Electricity | Analyzing Electrical Circuit Using KCL and KVL-3 | (GA)

in this illustration, we analyze this electric circuit using kirchhoff’s current law and voltage law. here, in the circuit shown in figure we are required to find, the current in this resistance, r. again here i’ll solve the circuit by, using kirchhoff’s current law, for which, i can, distribute the potential first. say if i […]

## 12. Class 12 Physics | Current Electricity | Circuit Symbol of a Resistance & Equations of Ohm’s Law

let us discuss about circuit symbol of resistance and equation of ohms law. i hope all of you aware about that in. electrical circuit, resistance is represented by a zigzag line. say if there are 2 terminals ay and b. across which resistance r is connected. and say if, at terminal ay potential is v-a […]

## 20. Advance Illustration | Current Electricity | Extraneous Charge at the Dielectric Boundary | (GA)

in this illustration we’ll study about extraneous charges at the dielectric boundary. here we are given that a parallel plate capacitor is filed up with 2 dielectric layers, 1 and 2. with thickness is d 1 and d 2. and dielectric constants k 1 and k 2, and with resistivity is ro 1 and ro […]

## 23. Class 12 Physics | Current Electricity | Parallel Combination of Resistances | by Ashish Arora

let us study about the parallel combination of resistances. in case of parallel combination resistances are connected in such a way. that different resistances. the side terminals are connected to each other like this which i am drawing here. here you can see if we are having 3 resistances r-1 r-2 and r-3. if all […]

## 1. Physics | Current Electricity | Resistance of a Conductor with Varying Cross-Section | (GA)

here in this illustration, we’ll discuss about the resistance of a conductor with varying cross section. here you can see the figure shows a conductor of length l. and having a cross section which is varying. and, the radius of cross section varies linearly from, radius ay to b. and the resistivity of material given […]

## 19. Advance Illustration | Current Electricity | Equivalent Resistance of an Infinite Grid

in this illustration we’ll demonstrate you how to calculate the equivalent resistance of an infinite grid. here the figure shows an infinite wire grid with square cells, and the resistance of each wire between neighboring junction is r. and here we are required to find the equivalent resistance of the grid across these 2 points, […]

## 26. Class 12th Physics | Current Electricity | Solved Example-11 on Current Electricity

in this example we are required to find the equivalent resistance of the infinite ladder circuit shown in figure. across the terminals ay and b. in the previous topic of capacitance, i hope you can recall we have discussed about, the ladder circuits. in which we can replace. the circuit after one section, of. these […]

## 18. Physics | Current Electricity | Electromotive Force (EMF) | by Ashish Arora (GA)

let us study about electromotive force. this is term which is also abbreviated as e m f. and now onward we are going to use the term e m f, very frequently, in this chapter, as well as in the, coming topics. about e m f we can write that. any devices. which can. continuously. […]