Lenz's law is a direct consequence of the law of conservation of which physical quantity?

Solution

1. Lenz's law states that the direction of an induced current always opposes the change in magnetic flux that created it.
2. If the induced current did not oppose the change, it would create a force that accelerates the motion, leading to an infinite increase in energy without work.
3. Therefore, the opposition ensures that external work must be performed to overcome the magnetic force, maintaining the law of conservation of energy.
4. Hence the answer is (B).