|Energy Work Power|
|Properties Of Matter|
|Heat Temperature And Thermal Expansion|
|--Types of Charging|
|--Electrical Forces Coulomb's Law|
|--Electric Potential and Electric Potential Energy|
|--Capacitance and Capacitors|
|--Capacitors in Series and Parallel|
|Exams and Problem Solutions|
A charged particle exerts a force on particles around it. We can call the influence of this force on surroundings as electric field. It can be also stated as electrical force per charge. Electric field is represented with E and Newton per coulomb is the unit of it.
Electric field is a vector quantity. And it decreases with the increasing distance.k=9.109Nm2/C2
Electric Field Lines
Motion path of the “+” charge in an electric field is called electric field line. Intensity of the lines shows the intensity of the electric field. Pictures given below show the drawings of field line of the positive charge and negative charge.
Electric field lines;
Pictures given below show the path of lines of two same charges and two opposite charges.
Example: Find the electric field created by the charges A and B at point C in terms of k.q/d2?
Example: If the electric field at point A is zero, find the charge at point D in terms of q.
Force Acting on a Charged Particle inside Electric Field
F=E.q where; F is the force acting on the charge inside the electric field E.Using this equation we can say that;
If q is positive then F=+E.q and directions of Force and Electric Field are same
If q is negative then F=-E.q and directions of Force and Electric Field are opposite
Example: If the charge q having mass m is in equilibrium between the two plated having distance d, find the potential difference of power supply.
Electric Field of a Conductor Sphere
There is a maximum electric field at surface of the sphere. As distance increases from the surface, electric field decreases. Finally, as it seen from the picture, inside the conductor sphere electric field is zero.