A nichrome wire has diameter 0.5 mm and resistivity of 10*2 ohm m. What will be the length of the wire to make its resistance of 70 ohm ?
(a) 48.75 m
(b) 187.5x10^-4 m
(c) 137.5x10^-3 m
(d) 122.7 m
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Explanation:
the correct ans is a 48.75m
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