Physics, asked by ashkaushik405, 7 months ago

A wire has a radius of 2 mm and a length of the 40cm. Of it's resistance is 20 m .what is it's resistivity??

Answers

Answered by awesome58

1

Answer:

4.9 ohm meter

Explanation:

Resistivity= Resistance× area of cross section/ length of wire

resistivity= 20×3.14×0.2×0.2/40

resistivity=4.9 ohm meter

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