Which one of the following can produce electromagnetic waves?

Options

A. Charge at rest
B. charge moving with constant velocity
C. Acceleration charge
D. Electrically neutral particle

Explanation

To determine which of the given options can produce electromagnetic waves, we need to analyze each option based on the principles of electromagnetism.

### Step-by-Step Solution:

1. **Understanding Electromagnetic Waves**:
- Electromagnetic waves are produced by the acceleration of electric charges. They consist of oscillating electric and magnetic fields that propagate through space.

2. **Analyzing the Options**:
- **Option A: Charge at rest**:
- A stationary charge produces an electric field but does not produce a magnetic field. Since both electric and magnetic fields are required to generate electromagnetic waves, this option cannot produce them.

- **Option B: Charge moving at constant velocity**:
- A charge moving at a constant velocity generates a magnetic field due to the current it creates. However, since the current is constant, the magnetic field remains constant as well. A constant magnetic field does not induce a changing electric field, which means no electromagnetic waves are produced. Thus, this option also cannot produce electromagnetic waves.

- **Option C: Accelerating electron**:
- An accelerating charge (like an electron) changes its velocity, which leads to a changing current. This changing current generates a changing magnetic field. According to Faraday's law of electromagnetic induction, a changing magnetic field induces an electric field. Therefore, both electric and magnetic fields are present and vary with time, allowing for the generation of electromagnetic waves. This option can produce electromagnetic waves.

- **Option D: Electrically neutral particle**:
- An electrically neutral particle does not possess an electric charge, and therefore cannot produce an electric or magnetic field. Since electromagnetic waves require both fields, this option cannot produce them.

3. **Conclusion**:
- The only option that can produce electromagnetic waves is **Option C: Accelerating electron**.

### Final Answer:
**Option C: Accelerating electron** can produce electromagnetic waves.

---