a potential difference 8v applied across end of a conducting wire of length 3m amd area of section 2cm².the resulting current in the wire is 0.15 A. calculate resistances and resistivity of wire.
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V=8V
length=l=3m
A=2cm²
current I=0.15A
R=V/I=8/0.15
=53
resistivity=53*3/2
= 51
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