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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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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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10 Questions

1. The dimensions of energy are _____
2. Fire is a form of _____
3. The law of conservation of energy is not applicable to mechanical systems as they require energy input to keep working.
4. Which of the following is not true?
5. 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.
6. When a person intakes 3000 kcal of food, he is able to do work requiring energy of 2500 kcal. This means that the human body destroys a fraction of energy obtained from food.
7. The maximum potential energy in a roller coaster is at _____
8. The energy possessed by an object because of its motion is termed _____
9. For a freely falling body, which of the following quantities will not change?
10. Which of the following statements are true?