(i) Define electrical resistivity. Write its SI unit. (ii) State the Ohm’s law. Also draw the graph between potential difference (V) and electrical current (I).
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electrical resistivity is the opposition to the flow of currany in a conductor R=V/I
Ohms lawis states that the current through an ohmic conductor is directly proportional to potential difference across it provided the temperature and other physical conditions remain constant
SI unit of electrical resistance Is ohms ¤
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