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What is electric resistivity of a material . Derive its S I unit .Describe an experiment to study the factor on which the resistance of a conducting wire depends.Help Plzz....

Answer»

Resistivity : when a CONDUCTOR has LENGTH 1m
and CROSS sectional area is 1m²,then resistance of conductor is CALLED resistivity.
R=pl/A
put l=1m and A=1m².
R=P
this resistance is called resistivity.
resistance of a conductor DEPENDS on dimensions of the conductor(volume ,length,area).



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