What explains the thermal effect of the current?

The reason for the heating of a substance by an electric current is the collision of charged particles moving under the influence of an electric field with the atoms of the substance, the temperature of the substance rises.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.