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A metal wire has a dia meter of 0.25 mm and electrical resistivity of 0.8×10(power -8) m (1) what will be the length of this wire to make a resistance f ohm? (2) how much will the resistance change,if the dia meter of wire is doubled? |
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Answer» ll be the change in the RESISTANCE of EUREKA wire, when its radius is halved and LENGTH is REDUCED to one-fourth |
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