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📘 Copper wire waits beneath the glass

An induction cooktop looks like a smooth glass surface, but its working part is a flat coil of copper wire underneath.

3
lessons
~15 min
to learn
Adults
level
Start the course →

What you’ll learn

  1. Coil and fieldIdentify the coil, inverter, and changing field that link electronics to the pan.Alternating current beneath the glass creates a field that induces effects in cookware.
  2. Pan currents and cookwareConnect eddy currents, resistance, and magnetic cookware to Joule heating.Induced currents and compatible pan bases convert electromagnetic energy into heat.
  3. Control and the full loopRelate power settings, coupling geometry, and the full chain from coil to cooked food.Electronics, near-field overlap, and pan resistance complete the induction heating loop.

Questions this course answers

What does the cooktop coil create when alternating current flows through it?

Alternating current in the coil creates a magnetic field that repeatedly changes direction and strength.

Why does the pan become hot?

Induced eddy currents dissipate energy as heat when they flow through the pan’s resistance.

Why can a magnetic stainless-steel base work better than ordinary aluminum?

Magnetic cookware can concentrate and respond to the field more effectively than an ordinary nonmagnetic base.

Put the heating sequence in order.

Each step supplies the cause for the next step, from controlled electrical input to thermal output.

Why does pan position matter on an induction zone?

Induction is a near-field transfer process, so distance, overlap, flatness, and cookware construction affect coupling.

Where is most of the intended heat generated in induction cooking?

Eddy currents and magnetic losses generate heat in the cookware, which then heats the food.

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