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Definitions

RAD 121

QuestionAnswer
Define electromotive force (EMF) maximum difference of potential between terminals of a battery or generator
Define volt. The unit of potential difference (EMF) - that potential difference which will maintain a current of one ampere in a circuit whose resistance is one ohm
define current amount of electric charge flowing per second
define ampere one coulomb quantity of electric charge flowing per second (6.25 x10 to power 18 - free electrons per sec)
Define resistance that property of circuit which opposes or hinders the flow of electric current (does NOT slow current)
Define work the potential difference between two points
define potential difference the difference in electrical potential energy between two points in a circuit
Define insulators nonconducting material - no free electrons therefore offer tremendous resistance to the flow of electricity DIELECTRICS
On what does the resistance of a material depend? a. Material - ie wood vs metal b. Length - longer/more resistance - RESISTANCE IS DIRECTLY PROPORTIONAL TO LENGTH c. Cross-sectional area - larger/lower - RESISTANCE IS INVERSELY PROPORTIONAL SIZE d. Temperature - resistance increases as temp rises
Created by: Larobbins