# The length of the material can be measured with a ruler or caliper, and its resistance with an ohmmeter. Knowing these values, it is possible to calculate the resistivity of the material ?

The length of the material can be measured with a ruler or caliper, and its resistance with an ohmmeter. Knowing these values, it is possible to calculate the resistivity of the material ? on:
?= R A/L
(a) What will happen to the material’s resistivity if the resistance is increased?
(b) What will happen to the material’s resistivity if the length is increased?
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Mireya Hoffman
Given,
$\rho =\frac{RA}{L}$
a) if R is increased, there will be no effect on Resistivity because Resistivity is the property of material and it only depend on material.
b) if L is increased, then also Resistivity will not change.