The physical quantity, which is conserved on the basis of Lenz's Law is

Options

A. Charge
B. Momentum
C. Mass
D. Energy

Answer

To solve the question regarding the physical quantity that is conserved based on Lenz's Law, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Lenz's Law**: Lenz's Law states that the direction of the induced electromotive force (EMF) and the induced current in a closed loop is such that it opposes the change in magnetic flux that produced it. This means that if the magnetic flux through a loop increases, the induced current will flow in a direction to create a magnetic field that opposes the increase. Conversely, if the magnetic flux decreases, the induced current will flow in a direction to oppose the decrease.

2. **Identify the Conservation Principle**: Lenz's Law is fundamentally related to the conservation of energy. When there is a change in magnetic flux, energy is either stored in the magnetic field or released from it. The induced current acts to counteract this change, thereby conserving energy in the system.

3. **Relate to Energy Conservation**: When magnetic flux changes, the energy associated with the magnetic field changes as well. The induced current will work to maintain the energy balance by opposing the change in flux. This is a manifestation of the principle of conservation of energy, which states that energy cannot be created or destroyed, only transformed from one form to another.

4. **Conclusion**: Therefore, the physical quantity that is conserved according to Lenz's Law is energy. The induced EMF and current ensure that any change in magnetic flux does not result in a net gain or loss of energy in the system.

### Final Answer:
The physical quantity that is conserved based on Lenz's Law is **energy**.

---