# Shared Flashcard Set

## Details

chapter 23 physics
electric current
16
Physics
10/13/2011

Term
 difference in electric potentil beetween two points, free charge flows when there is a difference and will continue untill both points reach a common potential.
Definition
 potential difference
Term
 for potential difference the flow of charge persists for as ___________________.without a potentail difference,_______________
Definition
 -long as there is potentail difference.-no charge flows.
Term
 the flow of electric charge is called
Definition
 electric current
Term
 what does a sustained current require
Definition
 a suitable pumping device which provides difference in electric potential
Term
 the unit of electric potential difference is called
Definition
 volt
Term
 what is a prime mover and source of voltage in an electric circuit.
Definition
 battery or generator.
Term
 how much current exists depends not only on the voltage but also on the___________________ the conductor offers to the flow of charge,
Definition
 electrical resistance.
Term
 a short pipe offers___________ less resistance to water flow than a long pipe, but the wider pipe results in______________
Definition
 lessless
Term
 does warm air mean less resistance for wires
Definition
 false
Term
 the relationship among voltage, current , and resistance is summarized in a statement callled_____________.
Definition
 ohms law
Term
 electrical resistance is measureed in units called_________.
Definition
 ohms
Term
 between dry and moist skin which will cause more damage when touching electrodes of a battery.
Definition
 wet fingers
Term
 to recieve a shock thhere must be a ___________ in electrical potential between one part of your body and ____________.
Definition
 differenceanother part
Term
 when a current flows in one direction it is called_________when a current is moved first in one direction and then the opposite alternating to and fro about in relatively fixed position it is caled_________________.
Definition
 direct currentalternating current.
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