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Electrostatic Mind Map, image, image, image, image, image, image - Coggle…
Electrostatic Mind Map
Static Electricity and Charge
The electric charge of one electron is equal in magnitude and opposite in sign to the charge of one proton.
The law of conservation of charge ensures that whenever a charge is created, an equal charge of the opposite sign is created at the same time.
For example, if two objects are rubbed together, especially if the objects are insulators and the surrounding air is dry, the objects acquire equal and opposite charges
Electric Field: Concept of a field Revisited
A field is a way of conceptualizing and mapping the force that surrounds any object and acts on another object at a distance without apparent physical connection.
For example, the gravitational field surrounding the earth (and all other masses) represents the gravitational force that would be experienced if another mass were placed at a given point within the field.
In the same way, the Coulomb force field surrounding any charge extends throughout space. Using Coulomb’s law, F=k|q1q2|/r2, its magnitude is given by the equation F=k|qQ|/r2, for a point charge
Conductors and Insulators
Metals such as copper typify conductors, while most non-metallic solids are said to be good insulators, having extremely high resistance to the flow of charge through them.
Conductors: Silver, Cooper, gold, aluminum, iron, steel, brass, bronze, mercury.
In a conductor, electric current can flow freely, in an insulator it cannot.
Insulators: glass, rubeer, oil, asphalt, fiberglass. porcelain, ceramic and quartz.
It should also be understood that some materials experience changes in their electrical properties under different conditions. Glass, for instance, is a very good insulator at room temperature, but becomes a conductor when heated to a very high temperature.
Coulumb's law
he vector form of Coulomb's law is important as it helps us specify the direction of electric fields due to charges.
has a great many applications to modern life, from Xerox machines to laser printers, to powder coating.
states that the electrical force between two charged objects is directly proportional to the product of the quantity of charge on the objects and inversely proportional to the square of the separation distance between the two objects.
Electric Field Line: Multiple Charges
The electric field surrounding three different point charges. (a) A positive charge. ... In many situations, there are multiple charges. The total electric field created by multiple charges is the vector sum of the individual fields created by each charge.
If lines for two different values of the potential were to cross, then they would no longer represent equipotential lines.
