Card Set Information
Electricity science chapter 10
Science-Electricity chapter 10
what is a radiation dosimeter?
a small devic that detects and measures exposure to radiation
eg used by astronauts and people who work with radioactive materials
What is Electricity?
A form of energy that results from the interaction of charged particles, such as electrons or protons.
What is static charge/static electricity?
an electric cahrge that tends to stay on the surface of an object, rather than flowing away quickly
eg. rubbing feet on floor, charge on body until you touch another object
What is charging by friction?
a process in which objects made from different materials rub against each other, producing a net static charge on each
eg. sock and shirt in dryer
what is an electrostatic series?
a lost of materials that have been arranged according to their ability to hold onto electrons. weakest ability at top
what is an insulator?
a material in which electrons cannot move easily from one atom to another
what is a conductor?
a material in which electrons can move easily between atoms
what is a semiconductor?
a material in which electrons can move fairly well between atoms
what is ground?
an object that can supply a very large number of electrons to, or can remove a very large number of electrons from, a charged object, thus neutralizing the object
what is an electroscope?
a device for detecting the presence of an electric charge
eg. meatl leaf electroscope, pith ball electroscope
what is charging by contact?
generating a charge on a neutral object by touching it with a charged object
eg. contact with a negatively charged object gives a neutral pith ball a negative charge
what are the laws of electric charges?
laws that describe how two objects interact electrically when both charged
--> and <--
--> <--() and ()--><--
what is an electric field?
a property of the space around a charged object, where the effect of its charge can be felt by other objects
what is induced charge separation?
the movement of electrons in a substance, caused by the electric field of a nearby charged object, without direct contact between the substance and the object
(see textbook page 415 for detailed diagram)
what is an ion?
a charged atom or group of atoms
ie.formed in the process of lightning
what is a lightning rod?
a metal sphere or point, attatched to the highest point of a building and connected to the ground
what is an electrostatic precipitator?
a type of cleaner that removes unwanted particles and liquid droplets from a flow of gas
what is a van de graff generator?
a device that accumulated very large charges