A moving conductor coil in a magnetic field produces an induced emf. This is in accordance with :

Options

A. Lenz's Law
B. Coulomb's Law
C. Faraday's Law
D. Ampere's Law

Answer

To solve the question, we need to identify which law describes the phenomenon of a moving conductor coil in a magnetic field producing an induced electromotive force (emf). The options given are Lenz's law, Coulomb's law, Faraday's law, and Ampere's law.

### Step-by-Step Solution:

1. **Understanding the Context**:
- We have a moving conductor coil within a magnetic field. When the coil moves, it interacts with the magnetic field, which leads to the generation of an induced emf.

2. **Identifying Relevant Laws**:
- **Coulomb's Law**: This law describes the force between two charged particles and is not relevant to the generation of emf in a coil.
- **Ampere's Law**: This law relates to the magnetic field generated by electric currents but does not describe induced emf.
- **Lenz's Law**: This law gives the direction of the induced current or emf but does not explain how the emf is generated.
- **Faraday's Law**: This law states that an induced emf is generated in a circuit when there is a change in magnetic flux through the circuit.

3. **Applying Faraday's Law**:
- According to Faraday's law, the induced emf (ε) in a closed loop is proportional to the rate of change of magnetic flux (Φ) through the loop:
\[ \epsilon = -\frac{d\Phi}{dt} \]
- The negative sign indicates the direction of the induced emf as per Lenz's law, which states that the induced emf will always work to oppose the change in flux.

4. **Conclusion**:
- Since the question specifically asks about the generation of induced emf due to the movement of the coil in a magnetic field, the correct answer is **Faraday's Law**.

### Final Answer:
The induced emf produced by a moving conductor coil in a magnetic field is in accordance with **Faraday's Law**.