On applying the same potential difference between the ends of wire of iron and copper of the same length,the same current flows in them .compare their radii of iron /copper. specific resistance of iron and copper are respectively 1.0x10^-7 and 1.6x10^-8ohm metre
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here.........................
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ashutoshjha10:
It is not in a oppstion
Oppstion are (a)2.5 (b)25(c)6.25(d)625
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