physics notes Unit 6 - Digging up the Past (DIG) AKA electric fields and further mechanics

,
, Resistivity
RESISTANCE opposition to flow of current


#
#



Rx(




7
(2
--
①Q # ⑦ &

-
-
1 R
R
=
2) [r] [m]
[m] &




A [m2]

--
*
P =
resistivity of
a material : -m


A better ·
constant per material
conductor
= lower
resistivity measure of resistance
·




of a material
,

independent of the
volume


FACTORS AFFECTING RESISTIVITY
Of A WIRE :


·
length of wire
o cross-sectional area
Rel
o thickness / width
material
A
o
type of