During the heating process, a large amount of current passes through the coil of the electric kettle, also known as the "heating element".

    The coil has resistance (a measure of how difficult it is for current to flow through it). The coil converts electrical energy into heat energy by serving as a resistance.

    This is why electric kettles use relatively large amounts of electricity, which allows for fast heating.

    The generation of heat is directly proportional to the square of the current, so a larger current will produce more heat, making the heating process faster.