a charged atom

can be positively or

negatively charged

imbalance

of

electrical charges

attractive...or...repulsive

force

exerted by

all charged objects

on each other

surrounds

every electric charge

and

exerts forces on

other electric charges

material in which electrons

can NOT

move easily

from place to place

materials where electrons

CAN

move easily from place to place

the rapid movement

of excess charge

from one place to another

for ex...lightening

the flow of electric charge

measured in amperes (amps)

closed

conducting loop

in which electric current can

flow continuously

a measure of the amount of

electrical potential energy

an electron flowing in a circuit can gain

measured in volts (V)

the measure of how difficult it is

for electrons to flow

through a material

Voltage = current   X   resistance

(in volts)   (in amperes) (in ohms)

V = IR

a circuit that has

only one path for

electric current to flow

a break in the circuit...the whole thing goes dead

ex....one light on christmas tree goes out

and then they all go out.

a circuit that has MORE THAN ONE

path for electrical current to flow

breaks in the path will not shut off the whole circuit

ex....outlets in your home.  If one light goes out the rest of house stays lit.

Power =    current   X   voltage

(in watts)   (in amperes)   (in volts)

P = IV