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Class 11 Physics Practice Test: Work, Energy and Power - Various Forms of Energy - The Law of Conservation of Energy
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Avg score: 57% • Most missed: “Which of the following is not true?”

The law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time. Energy can neither be created nor destroyed; rather, it can only be transformed or transferred from one form to another.

Class 11 Physics Practice Test: Work, Energy and Power - Various Forms of Energy - The Law of Conservation of Energy
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1. When a roller coaster is at the top of a steep hill, its potential energy is maximum. When it hurdles down the slope and comes to the bottom, the potential energy reduces greatly. Hence we can say that the law of conservation of energy is not valid here since energy is destroyed.

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