Electric Current Flashcards
What is Electrical Potential Energy?
The ability to move an electric charge from one point to another.
What is Potential Difference?
The work need to move one unit charge to another point.
What is a Cell?
A source of electric current that works on potential difference.
What is Electric Current?
The rate at which electric charges move through a conductor.
What are the four types of Electric Cells?
Electrochemical, Photoelectric/Photovoltic, Thermoelectric, and Piezoeletric.
What are some common uses of Electrochemical Cells?
They’re commonly used for normal batteries and automobile batteries.
What are some common uses of Photoelectric/Photovoltaic Cells?
Artifical satellites, calculators, and streetlight.
What are some common uses of Thermoelectric Cells?
Thermostats for furnaces and ovens.
What are some common uses of Piezoelectric Cells?
Microphones and headsets, computer keyboards, and record cartridges.
How do Electrochemical Cells work?
Electrons are transferred between metals immersed in electrolyte.
How do Photoelectric/Photovoltaic Cells work?
Electrons are released from a metal when struck by light of a sufficient energy.
How do Thermoelectric Cells work?
Two different metals are joined and they each have different-temperatured junctions, so electrons flow.
How do Piezoelectric Cells work?
Opposite surfaces of certain crystals become electrically charged under pressure.
What is Conventional Current?
The movement of positive charge.
What are the SI Units for Voltage, Current, and Resistance?
Volts, Amps, and Ohms.
