system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does a rice cooker know that the rice inside it is cooked?

Usually, i cook long grained white rice in our rice cooker and it takes about 10 minutes to cook. But recently, we switched to brown rice and its cooking time is longer, i think like 25 minutes. 

edit: thank you for all the answers guys!
gpt
Once the rice cooker's thermal sensor detects the pot going above 212 degrees, the water has all been absorbed. At that point, the rice is done. To prevent the rice from cooking any further, the sensor automatically trips the shut-off switch for the heating mechanism.