A copper wire of length 1m and radius 1m...

A copper wire of length 1m and radius 1mm is joined in series with an iron wire of length 2m and radius 3mm and a current is passed through the wires. The ratio of the current density in the copper and iron wires is

A

`2:3`

B

`6:1`

C

`9:1`

D

`18:1`

Text Solution

Verified by Experts

The correct Answer is:

C

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