Ch 20 1 Electric Charge & Static Electricity

Download Ch 20 1 Electric Charge & Static Electricity

Post on 18-May-2015

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  • 1. Electric Charge &Static Electricity 20.1 Chapter 20Electricity

2. What produces anet electric charge?

  • Electric Charge = property that causes subatomic particles such as protons and electrons to attract or repel each other
  • Protons have positive charge (+)

3. What produces a net electric charge?

  • Electrons have negative charge (-)
  • Ex. Electric charge = lightning bolt or static cling
  • An XS or Shortage of electrons produces a net electric charge- ions

4. What determines whetheran electric force is attractive or repulsive?

  • Electric Force = the attraction or repulsion between electrically charged objects
  • Like charges repel
  • Opposite chargesattract
  • Double electric charge willdouble the electric force
  • In an atom Electric forces are stronger than gravity = chemical bond

5. What determines the strength of an electric field?

  • Electric field= is the space around an object with an electric charge
  • The strength of an electric field depends on:
  • The amount of charge that produces the field
  • On the distance from the charge

6. What are three ways in which charge is transferred?

  • Charges can be transferred by
  • Friction = Ex. Rub balloon on hair Hair gives up Electron becoming (+) and balloon (-)
  • Contact = Van de Graff Generator a charged metal sphere causes hair to repel each other
  • By Induction = Ex. When you walk across a carpet & touch door knob get a shock

7. How does a static discharge occur?

  • Static discharge is the shock you feel when you touch a door knob.
  • Static discharge occurs when a pathway through which a charge can move forms suddenly.
  • When the gap between door and finger is small.
  • Lightning is the same but more dramatic

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