When electrical energy is converted into thermal energy, which of the following must be true?

Only the amount of electrical energy changes.
Only the amount of thermal energy changes.
The total amount of thermal energy plus electrical energy changes.
The total amount of thermal energy plus electrical energy doesn't change.

Question

When electrical energy is converted into thermal energy, which of the following must be true?  

Only the amount of electrical energy changes.
Only the amount of thermal energy changes.
The total amount of thermal energy plus electrical energy changes.
The total amount of thermal energy plus electrical energy doesn't change.

loser66 · Answer

sorry friend, I know nothing about physics

anonymous · Answer

its ok @Loser66

anonymous · Answer

@Luis_Rivera can you help?

anonymous · Answer

It is the last choice, which basically says that the total amount of energy cannot change, this is just a restatement of the Law Of Conservation of Energy!