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Is it true that there is no change in the resistivity of the conductor as it varies with the area of the cross-section?

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True

False

answer is A.

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Detailed Solution

The above statement is True.
No change in the resistivity of the conductor as the area of the cross-section varies.

\Rightarrow R = ρ \frac{l}{A}

Where

R = resistance

ρ = resistivity

l = length

and

A = area

Resistivity

ρ

depends upon the nature of the material and the temperature of the material.
Resistivity does not depend upon the area of the cross-section of the wire. Therefore, any shape, size or length change will not impact the material's resistivity.
The resistance per unit of length and cross-sectional area is known as resistivity. The ability of a substance to resist the flow of charge or electric current is one of its properties.