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- A form of energy that results from the interaction of charged particles, such as electrons or protons.
- E.g. Lightning
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.
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.
- 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.
- A material in which electrons cannot move easily from one atom to another.
- E.g. Rubber, glass, wood, pure water
- A material in which electrons can move easily between atoms.
- E.g. Copper, Brass, Silver, Steel
- A material in which electrons can move fairly well between atoms.
- E.g. Silicon, Germanium, Sulfur, Zinc Oxide
- 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
- A device for detecting the presence of an electric charge.
- E.g. Pith ball electroscope, metal leaf electroscope
Charging By Contact
- Generating a charge on a neutral object by touching it with a charged object.
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
- 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
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.
A charged atom or group of atoms.
- A metal sphere or point, attached to the highest part of the building and connected to the ground.
- A type of cleaner that removes unwanted particles and liquid droplets from a flow of gas.
Van de Graaff Generator
- A device that accumulates very large charges.
- A small device that detects and measures exposure to radiation.