PHYSICAL PROPERTIES OF MATERIALS
PHYSICAL PROPERTIES OF MATERIALS
PHYSICAL PROPERTIES OF MATERIALS
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Electrical Resistance<br />
Resistance in a uniform section of material (e.g., a wire)<br />
depends on its length L, cross-sectional area A, and<br />
resistivity of the material r<br />
R r<br />
L<br />
A<br />
or<br />
r R<br />
A<br />
L<br />
where resistivity r has units of -m 2 /m or -m (-in.)<br />
©2002 John Wiley & Sons, Inc. M. P. Groover, “Fundamentals of Modern Manufacturing 2/e”