For a rectangular block of resistive material, resistance depends on the current path length (L) and the cross-sectional area (A) perpendicular to current flow, following R = ρL/A, where ρ is the material's resistivity.
The block is 5 cm × 5 cm × 10 cm. The smallest cross-sectional faces are the 5 cm × 5 cm faces (area =...
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