1 / 22

ELECTRICITY

ELECTRICITY. The purpose of an X-ray unit is to convert electric energy into: ELECTROMAGNETIC ENERGY of the x-ray beam. TYPES OF ELECTRIC ENERGY CONVERSION. Recharging a car battery converts electric energy into chemical energy table saw converts into mechanical energy

lavonn
Télécharger la présentation

ELECTRICITY

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. ELECTRICITY

  2. The purpose of an X-ray unit is to convert electric energy into: • ELECTROMAGNETIC ENERGY of the x-ray beam

  3. TYPES OF ELECTRIC ENERGY CONVERSION • Recharging a car battery converts electric energy into chemical energy • table saw converts into mechanical energy • Kitchen appliances converts to thermal energy

  4. Matter has: mass form energy (may also have:)electric charge ELECTRIC CHARGE Positive and negative Electron and Proton ELECTROSTATICS

  5. ELECTRON AND PROTON • Electrons can travel from outer shell of one atom to another easily • Protons cannot travel easily or at all because they are fixed in the nucleus

  6. THEREFORE:ELECTRIC CHARGE IS PRIMARILY ASSOCIATED WITH ELECTRONS

  7. ELECTROSTATICS • The study of electric charges in stationary form. • Static electricity!!!

  8. ELECTRIFICATIONELECTRIFIED!!! • An object which as too many or two few electrons is considered to be electrified. • “The transfer of electrons from one object to another causes the first object to be positively electrified and the second object to be negatively electrified” page 76

  9. Contact Friction Induction Person to object Balloon Lightning CAUSES OF ELECTRIFICATION

  10. GROUND • Electrically neutral object which acts as a reservoir for electric charges

  11. COULOMB (C) • Because the charge of an electron is too small to measure, a fundamental measuring unit for electric charge is 1 C or • 6.3 x 10 to the eighteenth power electron charges

  12. ELECTROSTATIC LAWS • Like charges repel • unlike charges attract • Both form an electric field • Positive field radiates outward • Negative field radiate inward

  13. ELECTOSTATIC FORCE IS THE REPULSION OR ATTRACTION BETWEEN CHARGES DUE TO THE ELECTRIC FIELD

  14. COULOMB’S LAW:THE GREATER THE ELECTROSTATIC CHARGES FOR EITHER OBJECT, THE GREATER THE ELECTROSATIC FORCE

  15. COULOMB’S LAW:THE FORCE IS STRONGER WHEN OBJECTS ARE CLOSER, WEAKER WITH THE INCREASE OF DISTANCE

  16. ELECTRIC CHARGE DISTRIBUTION • ELECTRIC CHARGES ARE UNIFORMLY DISTRIBUTED THROUGHOUT THE OBJECT OR ON ITS SURFACE

  17. ELECTRIC CHARGE CONCENTRATION • THE ELECTRIC CHARGE OF A CONDUCTOR IS CONCENTRATED ALONG THE SHARPEST CURVATURE OF ITS SURFACE.

  18. ELECTRODYNAMICSWHAT IS IT? • Study of Charges in Motion • AKA: Electricity!!!!!!

  19. FLOW OF ELECTRONS=ELECTRIC CURRENT • THE FLOW THE ELECTRONS IS OPPOSITE THE CURRENT • ELECTRONS FLOW EASILY THROUGH CONDUCTORS

  20. Insulators impede the flow of electrons. • Semiconductors do both!! • Superconductivity: some material display no resistance below a critical temperature

  21. Superconductor Conductor Semiconductor Insulator Four States of Electrical Matter

  22. Electric Circuits • Electrons flow along outer surface of wire. When the path is closed and resistance can be controlled, this is known as an electric circuit.

More Related