Question

an aluminium cylinder of length 1 m and cross section are 0.02 mm2 has a resistance 1.34 ohms along its length what will be its resistivity ? how will the resistivity change if length of the cylinder is doubled

Answer 1

Answer:

Resistivity - 2.68 × (10)^-8 ohm-m

And it will have no effect on changing the length of the cyclinder.

I hope it will help.

Answer 2

THE RESISTIVITY OF THE ALUMINIUM CYLINDER WILL REMAIN THE SAME EVEN IF ITS LENGTH IS DOUBLED.

Explanation:

• The resistance is calculated by using the formula:

       $R=$ρ $\frac{L }{A}$

• The resistivity of a wire of metallic cylinder do not depend upon the length of the wire or metallic cylinder.

• It also do not depend upon the cross section area.
• Therefore, if the length is doubled or halved, the resistivity will not change it will remain the same.