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📘 How does an induction cooktop heat a pan?

Follow alternating magnetic fields into eddy currents and cooking heat.

lessons

~10 min

to learn

🔬 Science

subject

Adults

level

Start the course →

What you’ll learn

Under the glass
Changing field
Eddy currents
Ferromagnetic pans
Power electronics
Coupling
Temperature
Glass surface
Control and safety
The complete cycle

Questions this course answers

Where is most induction-cooking heat generated first?

The changing magnetic field induces currents in the pan, whose resistance produces heat.

Why does a cooktop use alternating current in its coil?

Electromagnetic induction depends on changing magnetic flux.

What does a magnet sticking to a pan usually indicate?

Ferromagnetic bases generally couple strongly to an induction field.

What are eddy currents in an induction pan?

The changing field induces circulating current loops inside the conductive pan.

What happens when a pan is removed from an active zone?

Pan-detection electronics can recognize the missing load and de-energize the element.

Grounded in trusted sources

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