Question: 2 A A copper wire ) = ( 1 . 6 9 1 0 - 8 . m and an iron wire ) = (

2A A copper wire )=(1.6910-8.m and an iron wire )=(9.6810-8.m of the same length have the same potential difference applied to them. What must be the ratio of their radii if the current is to be the same?
2 A A copper wire ) = ( 1 . 6 9 1 0 - 8 . m and

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