Yes, induction cookware generally needs to have flat bottoms to work efficiently and effectively on an induction cooktop. Induction cooking relies on electromagnetic induction to directly heat the cookware, and this process requires a close and consistent contact between the cookware and the induction cooktop's glass surface.
When the flat bottom of the induction cookware comes into contact with the smooth surface of the cooktop, the electromagnetic field can generate a circulating electric current within the cookware, producing heat and cooking the food. If the bottom of the cookware is uneven or not flat, there may be poor or uneven contact with the cooktop surface, resulting in inefficient heat transfer and slower cooking times.
Additionally, using cookware with uneven bottoms on an induction cooktop can lead to potential safety issues, as the cookware may wobble or not sit securely on the cooking surface, increasing the risk of spills or accidents.
To ensure the best performance and safety, it is recommended to use cookware with flat and smooth bottoms specifically designed for induction cooking. Many manufacturers label their cookware as "induction-ready" or "induction-compatible" to indicate that they are suitable for use on induction cooktops.