According to the Law of Conservation of Energy:
(A) Energy can be created but it can't be destroyed.
(B) Energy can neither be created nor be destroyed.
(C) Energy can be transformed from one form to another.
(D) Total energy of the universe always remains the same.
(E) Energy can be created and it can be destroyed.
Choose the most appropriate answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (B), (C) and (D) only
The law of conservation of energy says that energy can neither be created nor destroyed; it can only change from one form to another, so the total energy of an isolated system stays the same.
(A) Energy can be created but it can’t be destroyed. Incorrect. The law says energy cannot be created either.
(B) Energy can neither be created nor be destroyed. Correct. This is the law itself in its usual words.
(C) Energy can be transformed from one form to another. Correct. Energy only changes form, as chemical energy in a cell becomes electrical energy and then light in a bulb.
(D) Total energy of the universe always remains the same. Correct. The universe is taken as an isolated system, so its total energy is constant.
(E) Energy can be created and it can be destroyed. Incorrect. This is the opposite of the law.