Presentation on theme: "Notes on Chapter 32 Electrostatics"— Presentation transcript:
1 Notes on Chapter 32 Electrostatics Conceptual PhysicsNotes on Chapter 32Electrostatics
2 Electrostatics is electricity at rest --- non flowing!
3 ElectrostaticsElectrostatics is about atoms and parts that make up atoms:Positive charges - PROTONSNegative charges - ELECTRONSNeutral charges - NEUTRONS
4 Electrostatics Important facts of Atoms: Atoms are neutral so there are equal number of protons and electrons.Center of atom is the Nucleus - made up of protons and neutrons.Electrons “orbit” around the nucleus.All electrons are the same (same mass and charge), all protons are the same and all neutrons are the same.
6 ElectrostaticsAll atoms are neutral by nature. If one electron (negative charge) is removed, a ION is produced. Ions can be positive or negative.Conservation ofcharge states theno charge can becreated or destroyed
7 Electrostatics COULOMB’S LAW Coulomb’s law is similar to Newton’s law of gravity and shows how forces between two atoms attract or repel each other.
8 Electrostatics Newton’s Law : F = G m1m2 / d2 Coulomb’s Law : F = K q1q2 / d2(NOTE --- K & q are different only)(Note K = 9,000,000,000 Nm2/C2 )
9 ElectrostaticsIf an object allows electrons to flow from one place to another, it is said to be a CONDUCTOR. If a material does not then it is a INSULATOR.
10 ElectrostaticsAll substances can be arranged in order of their ability to conduct electricity.Some materials can be made to act as a conductor and as a insulator --- SEMICONDUCTOR.