How rice is cooked
Water and rice are poured in at the start of the cooking, and the water is heated to boiling point so the rice can absorb it to expand. After the preset time, the remaining water is boiled away and the machine switches to "keep warm" mode or shuts down. Here are some models and the ways on how they cook your rice:
Basic cookers
Also called as on/off rice cookers, they automatically shut off after the rice cooks but they have no indicator lights and their pans are regular aluminum, not non-stick. They are cheaper but have fewer featuers.