Question

The Lenz law is associated with

• A. law of conservation of charge
• B. law of conservation of mass
• C. law of conservation of angular momentum
• D. law of conservation of energy

Hint:

Lenz's Law is an expression of the principle of conservation of energy in the context of electromagnetic induction. It ensures that energy is neither created nor destroyed, only converted between forms.

Answer 1

The Correct Option is D

Lenz's Law is a fundamental principle of electromagnetism. It states that the direction of the induced current will always oppose the change in the magnetic flux that caused it. This is a manifestation of the law of conservation of energy, as the induced current works to counteract the change in energy that the changing magnetic field creates. Thus, Lenz's law is associated with the law of conservation of energy.

Answer 2

Step 1: Understanding Lenz's Law
Lenz's law states that the direction of induced current in a conductor due to a changing magnetic field is such that it opposes the change that produced it. This law helps determine the direction of induced electromotive force (emf) and current.

Step 2: Connection with energy conservation
Lenz's law is fundamentally a consequence of the law of conservation of energy. It ensures that the induced current will create a magnetic field opposing the original change, preventing the creation of energy from nothing.

Step 3: Physical significance
If Lenz's law were violated, the induced current would enhance the change in magnetic flux, resulting in a continuous increase of energy without any input, which violates the conservation of energy principle.

Step 4: Conclusion
Therefore, Lenz's law is directly associated with and confirms the law of conservation of energy.