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04 X material of the ong Answer Type Question 24 a Define resistivity Write an...

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04 X material of the ong Answer Type Question 24 a Define resistivity Write an expression for the resistivity of a substance Give the meaning of each symbol which occurs in it b State the SI unit of resistivity c Distinguish between resistance and resistivity d Name two factors on which the resistivity of a substance depends and two factors on which it does n embentou 4t didn e The resistance of a metal wire of length 1 m is 26 92 at 20 C If the diameter of the wire is 0 3 mm w will be the resistivity of the metal at that temperature

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