Question

Are there any contradictions to the law of conservation of energy in any area of science? State your reasons for your answer.

Answer 1

There are few Neuclear, tharmodynamical and Electromagnetic situation where you might think that there is a violation of the Law of conservation of energy, but in reality there is no contradiction at all.

Here is an example- Consider a reversable process (Such as Carnot engine) where you found that there is few amount of energy is permanantly loose as the effency of the engine is less than 100%. But exact calculation shows that there is a lose of energy in the form of entropy. The entropy of the whole universe is continuously increasing. If you include the entropy then the whole energy is conserved.

Similarly if you think about induced e.m.f in a conducting loop when a magnet is approching towards it, there you might think that the electrical energy is develop without any cost, or the process is violating the law of conservation of energy. But according to lentz's law the direction of induced current in the loop is such that it opposed the motion of the magnet. So, you have to done a work against this resisting force and this work done is converted into electrical energy.

Thus there is no process which contradict the conservation law of energy.