Electrostatics Notes

Describe Coulomb’s Law.

Coulumb’s Law: The electrostatic force between 2 electrically charged objects is directly proportional to the product of their charges and inversely proportional to their spereation squared.

Solve problems using 𝐹 = 1 4𝜋𝜀𝑜 𝑄𝑞 𝑟2 =𝑘𝑄𝑞 𝑟2 .

Formula: F=(K*Q1*Q2)/r²

F: Force

K: Constant of (9×10^9)

Q1: Charge on object 1

Q2: Charge on object 2

r: Seperation form centre to centre of objects.

Describe the concepts of electric fields, electric field strength and electrical potential energy.

Electric FIields: The region in space surrounding a charged object in which a second charged object would experience an eletric force.

Electric FIeld Strength: The force per unit charge (per 1c/columb) that would be exerted on an object of charge q, if palced at a particular location in an electric field.

Electrical Potential Energy: Electric potential energy is a potential energy that results from conservative Coulomb forces and is associated with the configuration of a particular set of point charges within a defined system.

Solve problems involving electric field strength using 𝐸 = 𝐹 𝑄 = 1 4𝜋𝜀𝑜 𝑞 𝑟2 =𝑘𝑞 𝑟2 .

Formula: 𝐸 = 𝐹/𝑄 = 1*q/4𝜋𝜀𝑜*r^2 = 𝑘q/r²

Solve problems involving the work done when an electric charge is moved in an electric field using 𝑉 = ∆𝑈 𝑞 .