How do Induction Stoves work?

Induction stoves seem almost magical: the pan gets scorching hot, the food cooks perfectly, and yet the stovetop itself stays cool to the touch. The secret lies in some clever physics.

What cookware is compatible with induction stoves?

Before we look at how these stoves work, it’s important to know that not all pots and pans work on induction stoves. The cookware must contain a ferromagnetic material (meaning it must be attracted to a magnet). Cast iron and magnetic stainless steel are the most common compatible materials. Aluminum, copper, glass, and ceramic cookware will not work unless they have a specially bonded magnetic base.

How do induction stoves work?

Induction heaters have a copper coil with alternating current passing through it, generating an oscillating magnetic field (it changes direction as the current alternates). The alternating magnetic field ‘pushes’ around the electrons. It does this through the Lorentz force, which acts on charged particles moving within a magnetic field. Because the electrons in the cookware’s base have no direct path to follow (unlike electrons in a wire), they are driven into closed circular loops. These loops of circulating charge are called Eddy Currents. (named after the swirling eddies or whirlpools seen in water)

The base of the utensils has resistance. Due to this, eddy currents passing through it generate a large amount of heat very quickly: providing a temperature high enough for cooking.

Are induction stoves safe?

Induction stoves are generally considered safer than gas or traditional electric stoves. These stoves are not sources of heat; only the utensil itself becomes hot. Due to this, the risk of burns from accidentally touching the hob is much lower. This is also why the area surrounding a pan on an electric stove is cool; only the area directly in contact with the pan gets hot. There are also no open flames, reducing fire risk and eliminating indoor air associated with gas cooking. The electric field generated from an induction stove, however, could interfere with electronics. So, it is advised for people using medical devices to take caution when using an induction stove.

an induction stove top

Other applications of induction

Induction heating is not limited to the kitchen. The same principles at work in your cooktop are used across a wide range of industries. In manufacturing, induction heating is used to harden or temper metal components, such as gears and shafts, by rapidly heating only the surface layer without affecting the core. The medical field uses induction principles in certain surgical tools and sterilization equipment, where precise, contactless heat is essential. Induction is also used in metal casting and forging, where large induction furnaces can melt steel or aluminum efficiently and with greater temperature control than traditional furnaces. Even in everyday electronics, small induction coils are used in wireless phone chargers, transferring energy through electromagnetic fields rather than physical contact: just like your induction stove transfers energy to the pan.

Induction technology is an example of cutting-edge physics making everyday life simpler, safer, and cleaner — one eddy current at a time.