AP Physics 2 - Electric Currents

electrodes

the simplest batteries contain two plates or rods made of dissimilar metals

electrolyte

solution/paste electrodes are immersed in

electric cell

device that contains electrodes and electrolyte

battery

several electric cells connected together

terminal

part of each electrode outside of the solution

circuit

continuous conducting path between the terminals of a battery

complete circuit

continuous

open circuit

has break

electric current

any flow of charge in continuous conducting path between the terminals of a battery

ampere

(amp) 1A=1C/s measures current

ground

common conductor that provides continuity

conventional current

direction positive charge will flow in a circuit

electron current

direction negative charge will flow

electrical resistance

opposition of the flow of electric charge/current

Ohm's Law

V=IR
I=V/R

Ohm

1 ( )=1V/A, measures resistance

resistor

used to control the amount of current in a circuit

voltage/potential drop

electric potential decrease from point to point

resistivity

p (ohm.m) physical properties

resistance formula

R=pL/A

electric power

the rate at which electrical energy is converted to another form of energy

electric power formula

P = QV/t=IV=I^2R=V^2/R

watt

unit for power (1W=1J/s)

kilowatt- hour

1KWH= 3.60x10^6 J, measures