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## Homework Statement

Consider a rectangular block of metal of height A, width B, and length C , as shown in the figure. If a potential difference V is maintained between the two A X B faces of the block, a current Iab is observed to flow.

Find the current that flows if the same potential difference V is applied between the two B X C faces of the block

http://session.masteringphysics.com/problemAsset/1126202/2/Walker4e.ch21.Pr023.jpg

## Homework Equations

V=IR, R=rho(L/A)

## The Attempt at a Solution

V=IR, R=rho(L/A)

V=I*rho*(L/A)

Iab=(V)/(rho*(C/AB))

Ibc=(V)/(rho*(A/BC))

I thought this last equation was right, but apparently it isn't. When I entered it, it said that B, V, and rho had no impact upon the answer. I'm not really sure what to do now...