How can one explain the heating of a conductor by electric current?

The reason for the heating of conductors by electric current is that free electrons in metals moving under the influence of electric forces interact with the ions of the substance of the conductor. As a result of this interaction, part of the kinetic energy of moving electrons is transferred to the ions of the crystal lattice. This leads to an increase in the internal energy of the conductor, i.e. an increase in its temperature, and we observe heating.

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