When electrical energy passes through the conductor, it increases the internal energy of the system, which in turn increases the energy of the atomic net and its molecules, which in turn leads to heat production. The heat generated in the system mainly depends on the major factors, namely

Electrical resistance provided by the operator is more resistance; there will be more heat to be produced.

The more current it flows, the more time it has, the more heat it produces.

The current value exceeds the driver. The higher the current size; heat is highly generated.