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m&m 9.2

Current Electricity

QuestionAnswer
Current electricity Electrons in motion compose an electron current; this is "flowing" electricity
Direct conductor Electricity that flows only one direction
Alternating current Electricity that flows first one direction and then the other
Luigi Galvani Discovered that body parts move because of electricity
Alessandro Volta Created the world's first battery called the voltaic pile
Voltaic cell A device that produces electric current by a oneway chemical reaction
Electrodes The two metal disks of each voltaic cell, where the positive and negative charges produced by the cell contact
Electrolyte An electrically conduction fluid that reacts with the electrodes to produce a current
Anode The negative electrode (the one that releases electrons).
Cathode The positive electrode
Wet cell Electrodes that are immersed in a liquid electrolyte
Dry cell Uses a moist, jellylike paste as an electrolyte
Terminals The negative terminal is connected to the anode, and the positive terminal is connected to the cathode allowing electric current to flow
Battery When two or more cells are connected together as a source of current
Storage cell Can discharge current and can be recharged time after time. Can be either wet or dry
Fuel cells Uses a continuous "fuel" supply to produce an electron current
Solar or photovoltaic cell A device that produces an electron current when light shines on it
Electromagnetic induction Can be used to convert mechanical energy into electric current. Devices that do so are called electric generators
Created by: Jer Stephens
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