Heating food on induction cooktops was discovered by physicist Léon Foucault.

Léon Foucault was a French physicist and inventor. In 1851, he discovered that an induction cooker could heat food. The principle is to use high-frequency current to pass through the toroidal coil to generate countless closed magnetic field forces. When the magnetic field lines pass through the bottom of the magnetic conductor, countless small eddy currents (an alternating current) will be generated. Household induction cookers use high-frequency currents of 15 to 30KHZ. Frequency current), the pot itself heats up at high speed, and then heats the food in the pot.

Later, Léon Foucault discovered in 1855 that a moving disk in a magnetic field generates eddy currents due to electromagnetic induction, which is why it is called "Foucault current". Not only that, it also used the rotation of the pendulum plane to prove the rotation of the earth. The simple pendulum that demonstrated the rotation of the earth was also called the "Foucault pendulum."

Notes when using the induction cooker:

1. The pot must be placed in the center of the induction cooker. Because the magnetic heating principle is used, when the container is offset, it is easy to cause unbalanced heat dissipation and cause malfunction.

2. Don’t fill the pot too full with water. The amount of water in the pot should not exceed 70% to avoid overflowing after heating, which may cause a short circuit on the substrate. ?

3. The induction cooker should be placed stably. If one leg of the induction cooker is suspended in the air, the gravity of the pot will force the pot to tilt and the food in the pot will overflow. If the stove surface is placed unevenly, the slight vibrations generated by the pot may easily cause the pot to slip out and cause danger.

4. Install dedicated power cords and power sockets. Due to the high power of the induction cooker, the power cord and socket must be configured according to the power. Usually, copper core wires that can withstand 15A current should be selected.

Reference for the above content: Baidu Encyclopedia-Foucault