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i) What do you understand by the resistivity of a substance?
ii) A wire is 1.0 m long, 0.2mm in diameter, and has a resistance of 10 ohms. Calculate the resistivity of its material?
a) Resistivity is the characteristic property of a substance that depends on the substance's nature and temperature.
b) Given: l = 1 m, d = 0.2mm, R = 10ohms
To find: We have to find the Resistivity of its material.
Solution:
We know that,
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