Molten iron is considered a good conductor of electricity, similar to its solid state. However, there may be a non-linear change in resistivity when transitioning from solid to molten form. Comparisons are made to mercury, which is a liquid at room temperature and also an effective conductor. The discussion highlights the need for further exploration of resistivity changes during state transitions. Overall, molten iron retains its conductive properties, but the behavior during phase changes warrants further investigation.