How does current flow in electrode type boilers?

In electrode type boilers, the operation relies on the principle of electrical conductivity of water. In these systems, electric current flows directly through the water that fills the boiler. The water itself serves as a conductor, allowing the electrical energy to convert into thermal energy via resistance heating.

When an electric current passes through the water, the specific electrodes within the boiler create an arc or a resistance path that generates heat. This heat then raises the temperature of the water, leading it to convert into steam or heated water efficiently. Therefore, the effectiveness of an electrode boiler fundamentally depends on the conductivity of the water and how well it allows current to flow.

This mechanism illustrates the unique design of electrode type boilers, distinguishing them from traditional boilers that use external heating elements. In contrast, the incorrect options pertain to scenarios that do not align with how these boilers operate: current does not flow through separate heating elements, steam, or fuel in the context of an electrode boiler. The energy conversion occurs right in the water itself, making it essential to the boiler's functionality.