A wire of length 3 m and area of cross-section 1.7X10-6 m2 has a resistance 3X10-2 ohm
a) What is the formula for resistivity of the wire and what is the unit of it
b) Calculate the resistivity of the wire.
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resistance = resistivity × length / area so resitivity = resistance x area / length it's s.i unit is ohm metre
calculation : 3 ×1.7 × 10 ^ -8 / 3 = 1.7 × 10^-8 ohm metre is the answer
calculation : 3 ×1.7 × 10 ^ -8 / 3 = 1.7 × 10^-8 ohm metre is the answer
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