# Shared Flashcard Set

## Details

Electrodynamics
N/A
15
Physics
Professional
03/05/2013

Term
 potential difference
Definition
 the force or strength of electron flowthe total maximum difference of potential between the positive and negative endsunit of measurement is volt
Term
 volt
Definition
 one joule of work done on one coulomb of charge sometimes abbreviated "E"
Term
 current
Definition
 the flow of electric chargemeasured in amperes
Term
 ampere
Definition
 the movement of 6.24 x 10^18 electrons/ secone coulomb of electric charge flowing per second
Term
 direct current
Definition
 electrons flow in same direction through a conductor
Term
 continuous DC
Definition
 an even current
Term
 pulsating DC
Definition
 moves in surges
Term
 alternating current
Definition
 electrons move first in one direction and then reverse and move in the other direction through a conductorcauses change in both amplitude and directionaccomplished by alternating direction of voltage at energy source
Term
 resistance
Definition
 the amount of opposition to the flow of electrons in an electric circuitdependent upon type of material
Term
 length of material
Definition
 resistance of a conductor is directly proportional to thisthe longer the wire, the greater the resistance
Term
 thickness of material
Definition
 resistance of a conductor is inversely proportional to its cross-sectional area(thicker the wire, less resistance)
Term
 ohm
Definition
 the resistance to a flow of current offered by a column of mercury 106.3 cm long with a diameter of 1 sq mm at 0 degrees Celsius
Term
 electrical circuit
Definition
 pathway that permits electrons to move in a complete circle from their source through resisting electrical devices and back to the source
Term
 3 essential requirements of a circuit
Definition
 1. source of EMF/voltage2. current carrying wire (conductor)3. resistive device to regulate rate of current flow (resistance)
Term
 Ohms law
Definition
 relationship between voltage, current, and resistanceV=IR
Supporting users have an ad free experience!