Electricity Chapter 10
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Electricity Chapter 10
A form of energy that results from the interaction of charged particles, such as electrons or protons.
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
, 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.
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.