Transcript Electric charge - Workforce Solutions
Electricity Mrs. Cromwell-Olson Electric charge All matter is made of atoms Atoms are made of protons (+), neutrons, and electrons (-) Law of Electric Charges- like charges repel, and opposite charges attract Protons and Electrons thus attract Electric Force Electric Force- the force between charged objects Strength of electric force depends on 2 factors: • size of the charges • distance between the charges Electric Field- region around a charged particle that can exert a force on another charged particle Electrical Energy / Current Cell- device that produces an electric current by converting chemical energy to electrical energy Battery- made of several cells Potential Difference- a difference in charge, allows electric current to flow; measured in volts (V) Current- rate at which charge passes a point; unit is ampere (A) Current / Resistance Direct Current (DC)- charges flow in one direction Alternating Current (AC)- charges continually switch directions Resistance- opposition to flow of electric charge; unit is ohm • Resistance depends on the material the wires are made of • Thick wires have less resistance than thin • Short wires have less resistance than long Electric Power / Circuits Electrical power- the rate at which electrical energy is used to do work Power = Voltage x Current Circuit- complete, closed path through which electricity flows Series Circuit- all parts are connected in a single loop (p.442) Parallel Circuit- different loads are located on different branches (p. 443) This workforce solution was funded by a grant awarded under Workforce Innovation in Regional Economic Development (WIRED) as implemented by the U.S. Department of Labor’s Employment and Training Administration. The solution was created by the grantee and does not necessarily reflect the official position of the U.S. Department of Labor. The Department of Labor makes no guarantees, warranties, or assurances of any kind, express or implied, with respect to such information, including any information on linked sites and including, but not limited to, accuracy of the information or its completeness, timeliness, usefulness, adequacy, continued availability, or ownership. This solution is copyrighted by the institution that created it. Internal use by an organization and/or personal use by an individual for non-commercial purposes is permissible. All other uses require the prior authorization of the copyright owner.