Join 60,000+ competitive exam aspirants
Which of the following statements is NOT true?
The total energy before and after the transformation always remains constant.
Energy can neither be created nor destroyed.
The total energy before and after the transformation is not constant.
Energy can only be transformed from one form to another.
The total energy before and after the transformation is not constant.
Apply the Law of Conservation of Energy, which states that total energy in an isolated system remains constant; therefore, any statement claiming it is NOT constant is false.
Apply the Law of Conservation of Energy, which states that total energy in an isolated system remains constant; therefore, any statement claiming it is NOT constant is false.
Analyze the principle of Conservation of Energy
The Law of Conservation of Energy is a fundamental physical law stating that energy can neither be created nor destroyed, only transformed from one form to another. Consequently, the total energy of a system remains constant.
Evaluate the given statements
1. 'The total energy before and after the transformation always remains constant' is TRUE. 2. 'Energy can neither be created nor destroyed' is TRUE. 3. 'Energy can only be transformed from one form to another' is TRUE. 4. 'The total energy before and after the transformation is not constant' directly contradicts the fundamental law and is therefore FALSE.
A: The statement is true according to the Law of Conservation of Energy. B: The statement is true as it represents the core definition of the law. D: The statement is true as it describes the nature of energy conversion processes.
C is correct because it states that the total energy is not constant, which contradicts the fundamental Law of Conservation of Energy (that energy is always conserved in a transformation).
In questions asking for the 'NOT true' statement, look for options that directly contradict established universal scientific laws or definitions; these are almost always the intended answer.