What is meant by electrical resistivity of a material? Derive it’s SI unit? Describe an experience to study the factor on which the resistance of a conductor wire depends?
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the electrical resistivity of a matter is depend as the resistance of a conductor made of that material of unit length and unit cross-sectional area.when the length of the wire is doubled then the ammeter reading decrease to half it previous value i.e., current through the wire is halved.
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