electrostatics full

                                                            notes

Charge 
charge is the property of matter that is responsible for electrical phenomena by which two objects attract or repel each other
There is two type of charges 
1(+)Ve positive charge 
2 (–)ve negative  charge 
                                    electrostatics  it is branch of physics which deals phenomena and property of electric charges at rest 

The substances   are divided into four  categories

 Conductors, insulator, semiconductor , dielectrics 

charge 
charge is the property of matter that is responsible for electrical phenomena 
charge is quantized q = ne


 
Coulomb’s Law:- according to coulombs law  the electrostatic force or repulsion b/w two charged body is directly proportional to product of their charges and inversely proportional to the square of the distsnce between thgeem

Coulomb's law in vector form                     

principle of superposition

according to principle of superposition total force on charge  due to another number of other charges at rest is the vector sum of all the forces due to other charges 

Electric field 

Electric field line

an electric field line defined as a path of straight or curved electric field

properties of electric field line

 1 electric field line is continuous but do not form closed loops

 2 tangent on the curve of electric field line is direction of electric field

 3 electric field line is always normal to surface of conductor

 4 the magnitude of the field is represented by density of field line

 5 electric field lines can not intersect each other 

Electric field on the axis of charged ring

 Electric Dipole .            

an electric dipole consist of a pair of equal and opposite charges separated by some small distance                               

It is vector quantity              
It'ssi unit is c/m
It is denoted by p ,     P =Qx2a

Electric field at axial position of dipole

Electric field at equitorial position iof dipole

Electric field at any point from of dipole

Torques

Potential energy .      

Playing with graph

One of the best book to understand the graphical problems diff type of f(x)

★Alzebric function .                                           

Polynomials, rational, irrational, modulus,Signum, greatest integers  ★Trigonometric  functions                                       

★Exponential functions                                   

★Logarithmic functionsG                                

★Geometrical curves.                                      

★ITF(inverse trigonometric function).