Ch 20 1 Electric Charge & Static Electricity
Post on 18-May-2015
- 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