1 / 22

Charge

Charge. Warm Up. What is an electron? Where is located in an atom? What is a proton? Where is it located in an atom?. Atoms. What are the parts in an Atom?. Electrons. E lectrons are present in the region of space outside the nucleus.

jethro
Télécharger la présentation

Charge

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Charge

  2. Warm Up • What is an electron? Where is located in an atom? • What is a proton? Where is it located in an atom?

  3. Atoms • What are the parts in an Atom?

  4. Electrons • Electrons are present in the region of space outside the nucleus. • They are negatively charged and weakly bound to the atom. • They are loosey goosey and float from one atom to the next • They like to party

  5. Protons and Neutrons • The nucleus of the atom contains positively charged protons and neutral neutrons.  • They are in the center of the atom. • The protons and neutrons will remain within the nucleus of the atom.  • They like to stay at home and watch Netflix. • THEY NEVER LEAVE THEIR HOME

  6. Charges at Rest Charge • there are two kinds of charge, positive and negative • positive charge comes from having more protons than electrons • negative charge comes from having more electrons than protons

  7. Charge Interactions • Opposite charges repel • Same charges attract

  8. Opposites Attract

  9. Sames Repel • “Why do you look at the speck of sawdust in your brother’s eye and pay no attention to the plank in your own eye?”

  10. Electrostatic charging • Materials are divided into three categories, depending on how easily they will allow charge (i.e., electrons) to flow along them. These are: • conductors • insulators • semi-conductors

  11. Conductors • the outermost electrons in the atoms are so loosely bound to their atoms that they’re free to travel around. metals, for example

  12. Insulators • In insulators, on the other hand, the electrons are much more tightly bound to the atoms, and are not free to flow, rubber, wood, plastic for example

  13. Semi-Conductors - • In between conductor and insulator • silicon is a good example

  14. Three ways that objects can be given a net charge • Charging by friction • Charging by conduction • Charging by induction

  15. Friction • this is useful for charging insulators. • rub one material with another • Electrons transfer from one material to the other. • For example, rubbing glass with silk or saran wrap generally leaves the glass with a positive charge; rubbing PVC rod with fur generally gives the rod a negative charge.

  16. Charge by Friction

  17. http://phet.colorado.edu/en/simulation/balloons

  18. Conduction • useful for charging metals and other conductors. • If a charged object touches a conductor • charging the conductor with the same sign as the charge on the object

  19. Induction •  also useful for conductors. • a charged object is brought close to the conductor, and does not touch it. • If the conductor is connected to ground (ground is basically anything neutral that can give up electrons to, or take electrons from, an object), • electrons will either flow on to it or away from it. • When the ground connection is removed , the conductor will have a charge opposite in sign to that of the charged object

  20. Polarization • is the process of separating opposite charges within an object

More Related