Skip to Main Content
Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
book

Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition

by John G. Webster, Halit Eren
February 2014
Intermediate to advanced content levelIntermediate to advanced
1921 pages
82h 13m
English
CRC Press
Content preview from Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
26-6 Electrical Variables
where
ρ
i
s
t
he
r
esistivity
i
n
Ω m
V i
s
t
he
v
oltage
m
easured
b
y
t
he
v
oltmeter
i
n
V
w
i
s
t
he
w
idth
o
f
t
he
s
ample
b
ar
m
easured
i
n
m
h i
s
t
he
h
eight
o
f
t
he
s
ample
b
ar
m
easured
i
n
m
I
is the current the ammeter measures owing through the sample in A
lʹ is the distance between the two points where the voltmeter wires make contact to the bar, measured in m
Note
th
at
th
e
tot
al
le
ngth
l of th
e
ba
r
is no
t
us
ed
to ca
lculate
th
e
fo
ur-point
re
sistivity:
th
e
le
ngth
lʹ
be
tween
t
he
t
wo
i
nner
c
ontacts
i
s
u
sed
.
26.3.3 Common Experimental Errors
ere are many experimental pitfalls to avoid when making resistivity measurements. e most com-
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Instrumentation and Control Systems, 3rd Edition

Instrumentation and Control Systems, 3rd Edition

William Bolton

Publisher Resources

ISBN: 9781439848913