Presentation on theme: "Notes on Chapter 32 Electrostatics"— Presentation transcript:
1Notes on Chapter 32 Electrostatics Conceptual PhysicsNotes on Chapter 32Electrostatics
2Electrostatics is electricity at rest --- non flowing!
3ElectrostaticsElectrostatics is about atoms and parts that make up atoms:Positive charges - PROTONSNegative charges - ELECTRONSNeutral charges - NEUTRONS
4Electrostatics 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.
6ElectrostaticsAll 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
7Electrostatics 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.
8Electrostatics 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 )
9ElectrostaticsIf 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.
10ElectrostaticsAll 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.