Lenz's law is a consequence of law of conservation of

Options

A. charge
B. energy
C. induced emf
D. induced currnet

Answer

### Step-by-Step Solution:

1. **Understanding Lenz's Law**:
Lenz's Law states that the direction of the induced current in a closed loop is such that it opposes the change in magnetic flux that produced it. This means that the induced current will create a magnetic field that opposes the motion of the magnet or the change in magnetic field.

2. **Example of Lenz's Law**:
Consider a scenario where a bar magnet is moving towards a circular coil. As the north pole of the magnet approaches the coil, the coil will induce a current that creates a north pole at the side facing the magnet. This induced north pole will repel the approaching magnet, opposing the change in magnetic flux.

3. **Direction of Induced Current**:
If the bar magnet is moving away from the coil, the coil will induce a current that creates a south pole at the side facing the magnet. This induced south pole will attract the retreating magnet, again opposing the change in magnetic flux.

4. **Energy Conversion**:
The movement of the bar magnet represents mechanical energy, which is being converted into electrical energy in the coil due to the induced current. When the magnet is stationary, there is no change in magnetic flux, and thus no induced current.

5. **Conservation of Energy**:
Lenz's Law is a manifestation of the law of conservation of energy. The induced current works to oppose the change in energy (in this case, the mechanical energy of the moving magnet), ensuring that energy is conserved in the system.

6. **Conclusion**:
Therefore, Lenz's Law is a consequence of the law of conservation of energy. The correct answer to the question is **option B**.