Question

What is the resistivity of cylindrical material wire whose length is 1m has a resistance of 2ohm?diameter is 0.5mn

Answer 1

Here Is Your Ans ⤵

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➡r = D / 2

➡r = 0.5 / 2 = 1 / 4

➡Area = πr² = 22 / 7 × (1/4)² = 22 / 112 = 0.196428571 mm = 0.000196428571 m

➡Resistivity = resistance × Area / length

➡Resistivity = 2 × 0.000196428571 / 1

➡Resistivity = 0.00039286 ohm meter

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