Genphysics

• Physical phenomena related to matter with electric charge

  Electricity
• ELECTRICITY COMES FROM THE GREEK WORD ____

  ELEKTRON
• Basic unit of matter

  Atom
• atom consists of

  electrons, protons, and neutrons
• OBJECTS NORMALLY CONTAIN EQUAL NUMBERS OF ___ AND ___

  ELECTRONS & PROTONS
• WHEN AN OBJECT HAS AN IMBALANCE IN THE NUMBER OF ELECTRONS AND PROTONS IT IS ____

  ELECTRICALLY CHARGE
• an english physicist who discovered electron

  J.J. Thomson
• when was electron discovered

  1897 by JJ Thomson
• a german who discovered positive particles

  Eugen Goldstein
• when was positive particles discovered

  1898 by Eugen Goldstein
• a new zealand-born british who discovered PROTONS and NUCLEUS

  Ernest Rutherford
• when was proton and nucleus discovered

  1911 by Ernest Rutherford
• an english who discovered NEUTRONS

  James Chadwick
• when was neutron discovered

  1932 by James Chadwick
• Law of Conservation of Charge


  "ELECTRIC CHARGE CANNOT BE CREATED OR DESTROYED, BUT IT CAN BE TRANSFERRED BETWEEN OBJECTS."
• CHARGE OBJECTS EXERT ____ ON EACH OTHER:

  ELECTRIC FORCES
• THREE COMMON WAYS TO CHARGE A NEUTRAL OBJECT

  Charging by friction, conduction, or induction
• defined as The amount of energy released when an electron is added to a neutral atom.

  Electron Affinity
• Atom's ability to accept an electroN

  Electron Affinity
• Arrangement of materials by their electron gain/loss abilities

  triboelectric series
• YELLOW OR REDDISH

  BROWN STONE USED FOR JEWELRY.

  AMBER
• OBJECTS WITH EQUAL NO. OF PROTON AND ELECTRON IS CALLED

  NEUTRAL OBJECT
• MASS OF PROTON


  1.67 x 10^-27 kg
• MASS OF ELECTRON


  9.11 x 10^-31 kg
• MASS OF NEUTRON


  1.67 x 10^-27 kg

  
  

  SAME AS PROTON
• protons are represented as

  p^+
• electrons are represented as

  e^-
• HOW WOULD YOU KNOW IF AN OBJECT WILL GAIN OR LOSE

  ELECTRONS?

  using triboelectric series
• THE FARTHER THE MATERIALS ARE FROM EACH OTHER IN THE

  SERIES, THE ____ IS ELECTRICAL FORCE OF ATTRACTION.

  STRONGER
• it doesn't let the electron flow

  insulator
• it doesn't let electron flow

  insulator
• it's easy for electrons to flow here

  conductor
• most used conductor

  copper
• best conductor

  silver
• charge of proton


  1.6 x 10^-19 C
• charge of electron


  -1.6 x 10^-19 C
• coulomb formula

  
  

  (force of electron=?)

  Fe = Kq1q2 / r²
• coulomb formula

  
  

  (distance=?)

  r= √Kq1q2 / Fe
• coulomb formula

  
  

  (charge=?)

  q2 = Fer² / Kq1
• value of K

  K= 9×10^9 N.m²/C²