0 4 mm diameter copper wire is connected with 2 mm diameter iron wire and...

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0 4 mm diameter copper wire is connected with 2 mm diameter iron wire and 4 mA current is passed through copper wire then current density in iron wire will be A 1 27 x 10 Am B 2x10 Am C 1 5 10 Am Ans 6 A 7 C 8 A 9 B 10 C 11 D 12 B 13 C 14 A 15 B 16 A 16 D 3x10 Am

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