define resistivity and SI unit also
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Resistivity is the resistance offered by an object per unit length and per unit cross sectional area at a specified temperature. The SI unit of resistivity of a substance is Ohm-metre (Ωm)
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Answer:
Resistivity is the resistance offered by an object per unit length and per unit cross sectional area at a specified temperature. The SI unit of resistivity of a substance is Ohm-metre (Ωm)
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