# Electricity Chapter 10

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1. Electricity
• A form of energy that results from the interaction of charged particles, such as electrons or protons.
• E.g. Lightning
2. Static Charge (Static Electricity)
• An electric charge that tends to stay on the surface of an object, rather than flowing away quickly.
• E.g. The effect of rubbing a balloon onto your hair.
3. Charging By Friction
• A process in which objects made from different materials rub against each other, producing a net static charge on each.
• E.g. Rubbing wool socks on a carpet.
4. Electrostatic Series
• A list if materials that have been arranged according to their ability to hold on to electrons.
• E.g. Refer to ON SCIENCE 9, pg 405,  table 10.1.
5. Insulator
• A material in which electrons cannot move easily from one atom to another.
• E.g. Rubber, glass, wood, pure water
6. Conductor
• A material in which electrons can move easily between atoms.
• E.g. Copper, Brass, Silver, Steel
7. Semiconductor
• A material in which electrons can move fairly well between atoms.
• E.g. Silicon, Germanium, Sulfur, Zinc Oxide
8. Ground
• An object that can supply a very large number of electrons to, or can remove a very large number electrons from, a charged object, thus neutralizing the object.
• E.g. Earth
9. Electroscope
• A device for detecting the presence of an electric charge.
• E.g. Pith ball electroscope, metal leaf electroscope
10. Charging By Contact
• Generating a charge on a neutral object by touching it with a charged object.
11. Laws Of Electric Charges
• Laws that describe how two objects interact electrically when one or both are charged.
• E.g. <-- -ve   -ve -->  and <-- +ve  +ve -->
• +ve --> <-- -ve
• +ve --> <-- n  and  -ve --> <--n
12. Electric Field
• A property of the space around a charged object, where the effect of its charge can be felt by other objects.
• E.g. Positively charged objects repel other positives and negatively charged objects attract positives
13. Induced Charge Separation
• The movements of electrons in a substance, caused by the electric field of a nearby charged object, without the direct contact between the substance and the object.
• E.g. When a charged piece of wool is brought near a pith ball electroscope.
14. Ion
A charged atom or group of atoms.
15. Lightning Rod
• A metal sphere or point, attached to the highest part of the building and connected to the ground.
16. Electrostatic Precipitator
• A type of cleaner that removes unwanted particles and liquid droplets from a flow of gas.
17. Van de Graaff Generator
• A device that accumulates very large charges.