An induction hob is an electric cooktop that heats your pan directly with a magnetic field instead of heating the glass first, so the cooking zone itself is not the primary heating element.
A pan that won’t stick to a fridge magnet won’t heat on an induction hob — that single detail trips up more first-time owners than any other. Whether you’re shopping for a new cooktop or standing at one wondering why nothing happens, the answer usually comes down to the base of the cookware in your hand.
The short version: an induction hob is an electric cooktop that uses a magnetic field to heat compatible cookware directly, rather than heating the glass surface first. The pan becomes the heat source, and the hob stays relatively cool except for residual heat transferred back from the pan. Here’s the mechanism, the cookware that works, and the safety points worth knowing.
How Does an Induction Hob Actually Heat a Pan?
A coil beneath the glass-ceramic surface carries alternating current and creates a rapidly changing magnetic field, which induces eddy currents in a ferromagnetic pan base. Those currents heat the pan through electrical resistance, a process known as Joule heating.
Typical operating frequencies run about 20 to 100 kHz. The cooktop stops energizing the coil the moment you lift the pan off, so the magnetic field disappears with it. That’s why an induction hob responds almost instantly to your adjustments — there’s no hot element left sitting between the power and the food.
Incompatible cookware is the one hard limit. Aluminum, glass, and copper pans have no magnetic base for the field to grab, so the hob simply won’t detect them. Cast iron, steel, stainless steel with iron content, and enameled cookware all work.
| Cookware Material | Works on Induction? | Why |
|---|---|---|
| Cast iron | Yes | Ferromagnetic base couples strongly with the field |
| Steel and most stainless steel | Yes | Iron content conducts eddy currents |
| Enameled cookware | Yes | Enameled steel or iron base is magnetic |
| Aluminum | No | Not magnetic; no eddy currents form |
| Glass | No | Non-conductive base |
| Copper | No | Conductive but not ferromagnetic |
| Induction-ready cookware | Yes | Magnetic disc built into the base |
What Are the Real Safety Points?
An induction surface can stay cooler than radiant electric or gas cooking, but it may still be warm from transferred heat after use — the glass itself never becomes the heating element, yet the pan sitting on it does. Treat the zone as hot until it’s had time to cool.
- Never leave empty cookware on the cooktop while it’s on.
- Metallic objects on an active hob can become hot and cause burns — don’t rest spoons or lids there.
- Keep sugar, plastic, and aluminum foil away from an active hob; they can melt or burn onto the glass.
- Center cookware properly on the cooking zone so it heats evenly.
- Clean spills promptly, before they bake onto the ceramic top.
Many induction ranges include pot-detection shutoff, so the coil cuts out when cookware is removed or the wrong pan is set down. That’s a genuine safety feature, not just a convenience.
If you’re outfitting a smaller kitchen, apartment, or camper, a compact unit is often the practical starting point — this tested roundup of the best 2 burner induction hob options covers what holds up in real use.
Why Does the Principle Hold Up Across Regions?
The physics behind an induction hob is the same everywhere — a magnetic field, eddy currents, and resistance heating don’t change with the plug on the wall. Public-health guidance from the German Federal Office for Radiation Protection and US university extension sources describes the identical mechanism, which is why cooktops sold in North America and elsewhere share the same core warnings.
Fisher & Paykel’s US/CA safety document, which applies to models CI365ZZDTB5, CI304ZZDTB5, CI244ZZDTB5, and CI122ZDTB5, carries the same cautions as its separate NZ/AU/UK/IE/SG sheet covering models CI905ZZDTB5 through CI302ZDTB5. Different model numbers, same magnet-driven design. the German Federal Office for Radiation Protection’s induction hob guidance lays out that shared principle in detail.
The practical takeaway: don’t judge a hob by where it was built. Test your pans with a magnet, and the mechanism will work the same in a Boston kitchen as it does in Berlin.
FAQs
Do I need special pans for an induction cooktop?
You need cookware with a magnetic base. Cast iron, steel, most stainless steel, and enameled pans all work. Aluminum, glass, and copper do not, because they lack the ferromagnetic quality the field requires. Press a fridge magnet to the base of a pan — if it sticks firmly, that pan will heat.
Is an induction hob safe around kids and pets?
The cooking zone is not the primary heating element, so the glass stays cooler than a radiant or gas cooktop. It can still be warm from transferred heat, and metallic objects left on an active hob can become hot enough to burn. Keep the surface clear and let it cool before touching.
What happens if I put the wrong pan on an induction hob?
Nothing heats, or the hob shuts the zone off entirely. Many induction ranges include pot-detection shutoff, so the coil stops energizing when it can’t sense a compatible base. If a zone won’t turn on, the pan is the first thing to check — not the appliance.
References & Sources
- German Federal Office for Radiation Protection (BfS). “Induction hob.” Explains the magnetic-field heating mechanism and compatible cookware.
- PBS NOVA. “How Induction Stoves Work.” Covers eddy currents and how the pan becomes the heat source.
- Bosch Home. “Getting started with induction hobs.” Manufacturer guidance on cookware selection and everyday use.
