The most effective mode to use for boiling water on an induction cooktop is the "Boil" or "High" setting. This mode provides the necessary power to rapidly heat water to its boiling point, which is 212°F (100°C) at sea level.

The reason for choosing the "Boil" or "High" mode is due to the efficiency of induction cooktops. Induction cooktops work by creating a magnetic field that directly heats the pot, rather than the surface of the cooktop itself. This means that the heat is transferred more quickly and directly to the water, resulting in faster boiling times compared to traditional electric or gas cooktops. According to a study by the U.S. Department of Energy, induction cooktops can heat water 50% faster than electric cooktops and 75% faster than gas cooktops. This efficiency not only saves time but also reduces energy consumption. Additionally, the precise temperature control of induction cooktops ensures that water reaches the boiling point without overheating, which can be a concern with other cooking methods.