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Electrictity

Electrical Principles& Technologies- topics 1 & 2

TermDefinition
secondary cells rechargeable cells
batteries made up of two or more cells
electorchemistry the study of chemical reactions involving electricity
electrolysis breakdown using electricity
electroplating coating a cheaper metal with the atoms of a more expensive metal, using an electrolyte
electrolyte liquid or paste used to conduct electricity
electrode conductor through which electric current enters or leaves a device or material
ion atom that has become electrically charged because it has lost or gained electrons
superconductor perfect conductor; substance with no resistance to electron flow
resistor device having resistance to electron flow; often used to control current in a circuit
rheostat continuously variable resistor used to regulate electric current; variable resistor
Ohm's law as long as temp. remains constant, the resistance of a conductor remains constant. And, current is directly proportional to voltage applied.
series circuit circuit-one pathway for the current, so the same current passes through all the components
parallel circuit circuit- the current can flow in two or more paths
photoconductors a resistor that becomes more conductive when exposed to light
transistors device(usually with 3 layers). Small VOLTAGE in middle layer controls CURRENT between outer layers-can act as a SWITCH or AMPLIFIER
integrated circuits circuits made of inseparable/microscopic components-(formed on a piece or chip of semiconductor crystal)
Created by: mandat