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Two wires `A` and `B` made of same material and having their lengths in the ratio `6:1` are connected in series The potential difference across the wire `3V` and `2V` respectively. If `r_A` and `r_B` are the radii of `A` and `B` respectively, then `r_B/r_A` is

A

`1//4`

B

`1//2`

C

`3`

D

`2`

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The correct Answer is:
B
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