Question

Which of the following is not true?

(a) Energy of an open system can be varied

(b) Energy cannot be created

(c) Energy cannot be destroyed

(d) Energy cannot be transformed

The question was asked in unit test.

Origin of the question is Various Forms of Energy : The Law of Conservation of Energy in section Work, Energy and Power of Physics – Class 11

Answer 1

Right option is (d) Energy cannot be transformed

For explanation I would say: According to the law of conservation of energy, energy can neither be created nor destroyed but can only be changed from one form to another. Energy in an open system can be varying because of constant matter and radiation exchanges with the surrounding universe.