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The density of a metal is d and specific resistance is row. A wire of length l and resistance R is to prepared . How much mass would be needed for this
Dear jitender as density =mass/volume mass =density *volume we have R=row*l/a by multiplying l in numerator and in denominator we get R=row*l2/al => R=row *l2/V (V=volume) and (al=volume) so V=row*l2/R put this into formula=> mass = dR /row*l2
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