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When using an induction cooktop, you may notice that the visible bubbling area inside a pot looks smaller than the stated induction coil diameter. For example, a cooktop may use a 9.25-inch coil, while the strongest boiling appears mainly near the center of the cookware.
Does this mean only part of the coil is working?
Why does this happen? Let’s take a closer look.
The induction coil sits underneath the cooking surface and creates an electromagnetic field that transfers energy into compatible magnetic cookware.
The coil diameter describes the approximate electromagnetic heating coverage beneath the cookware. It does not describe the exact area where bubbles will appear inside water or food.
Visible boiling is the result of several additional factors.
The coil diameter represents the approximate electromagnetic heating coverage, not the exact boiling area. Different parts of the cookware may absorb different levels of energy depending on coil design and cookware characteristics. Heat conduction, cookware material, bottom thickness, and natural water convection also affect where bubbles appear. The outer areas may still be heating but may not reach visible rolling boiling at the same time. Therefore, a smaller visible boiling area is a normal result of heat transfer and cookware conditions, and does not mean the induction coil is only partially working.
Yes.
