Question

pls help me to solve this question

Answer 1

Hi friend here is your answer

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Given data

Resistance -- 1.5 ohm

Length -- 80cm = 80 * 10^-2

Area of cross section -- 0.025 CM sq
= 0.025 * 10^-4m sq

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Solution

(Specific resistance is also known as Resistivity )

We know that

Resistivity = Resistance*Area / Length

= 1.5 * 0.025*10^-4 / 80*10^-2

= 4.6875 * 10^-6 ohm-meter

Hence the resistivity or the specific resistance of wire is 4.6875 * 10^-6 ohm-meter

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