Answer :
Some of the energy is converted into heat. This is the main reason why electrical material gets hot when connected to a source. Therefore, your initial energy does not equal final energy. This does not violated energy conservation law because the energy is being converted so it is never lost.
The difference between the amount of energy provided by the source and the amount of electrical energy produced is due to the heat loss.
What is heat loss?
Heat loss is the transfer of energy which is not required in a process.
In a process some of the energy is converted into the heat due to the friction or other process. Then this loss of energy is called the heat loss.
In the different method of generating electrical energy, some part of electric energy is converted into the heat as the component become hot in the operation.
This loss of heat results in the loss of final amount of energy produced.
Thus, the difference between the amount of energy provided by the source and the amount of electrical energy produced is due to the heat loss.
Learn more about the heat loss here;
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