1. The problem statement, all variables and given/known data A strip of copper 10 mm wide and 700 micrometers thick is placed in a uniform mag. field B magnitude 0.9 T, with B perpendicular to the strip. A current i = 45 A is then sent through the strip, such that a Hall Potential difference V appears across the width of the strip. Calculate V. 2. Relevant equations 3. The attempt at a solution I know that V = Ed, so I think my first step is to find E. However, I'm running into problems because it seems like they have given me a two dimensional object... For example, I assume E = i/pA would work here to find E, but what exactly is cross sectional area if the object is a "two dimensional" strip? I don't understand how they want me to work this. Any ideas?