Whats the working principle behind a Rice Cooker(electric)?

Question

Whats the working principle behind a Rice Cooker(electric)?
How does it know when Rice is actually done....

Answer 1

The bowl in the rice cooker is usually removable, and beneath it lies a spring and thermostat. These form the main components of the rice cooker. The spring in the bottom is simply to ensure contact of the thermostat to the base of the cooking bowl. During cooking the mixture is continuously heated. The temperature cannot go above the boiling point of water—100°C (212°F)—as any energy put into the system at that point will only cause the water to boil. At the end of cooking all of the water will have been evaporated or absorbed by the rice. Once the heating continues past this point, the temperature exceeds the boiling point. The thermostat then trips, and switches the rice cooker to "warm" mode, keeping the rice no cooler than approximately 65°C (150°F). Simple rice cookers, like the one below, may simply turn off at this point.

Answer 2

How Do Rice Cookers Work

Answer 3

Very good review. It reflects my general recommendations as a daily/near-daily rice eater - people who don't eat rice often but enjoy it should feel comfortable buying highly rated rice cookers from American brands. But for people who eat rice on a regular basis or like preparing different types of rice like brown or sushi rice, fuzzy logic rice cookers are optimal. http://www.mybestcookwarereviews.com/

Answer 4

The magic is water 'cos it's steam!

so, depending on the ratio of water and rice you put it, that makes your rice cooks either well done or half-cooked.
My experience is 1:1 ratio, but if you like softer, sticker servings, make it 1:1.5 (rice: water)

Answer 5

The underlying priniciple is the boiling point of water rises with increase in pressure