An Electric field can deflect

Options

A. `alpha`-particles
B. `X`-rays
C. Neutrons
D. `gamma`-rays

Answer

To determine which particle can be deflected by an electric field, we need to analyze the properties of each particle mentioned: alpha particles, X-rays, neutrons, and gamma rays.

### Step-by-Step Solution:

1. **Identify the Nature of Each Particle:**
- **Alpha Particles:** These are positively charged particles, consisting of two protons and two neutrons (essentially a helium nucleus).
- **X-rays:** These are high-energy electromagnetic radiation and do not carry any charge.
- **Neutrons:** These are neutral particles, meaning they have no charge.
- **Gamma Rays:** These are also high-energy electromagnetic radiation, similar to X-rays, and do not carry any charge.

2. **Understand the Effect of Electric Fields:**
- An electric field exerts a force on charged particles. The force is given by the equation \( F = qE \), where \( F \) is the force, \( q \) is the charge of the particle, and \( E \) is the electric field strength.
- Charged particles will experience a force and can be deflected by the electric field, while neutral particles will not be affected.

3. **Analyze Each Particle in the Context of the Electric Field:**
- **Alpha Particles:** Since they are positively charged, they will be deflected by the electric field.
- **X-rays:** As they are neutral (electromagnetic radiation), they will not be deflected.
- **Neutrons:** Being neutral particles, they will also not be deflected by the electric field.
- **Gamma Rays:** Similar to X-rays, gamma rays are neutral and will not be deflected.

4. **Conclusion:**
- The only particle that can be deflected by the electric field is the alpha particle.

### Final Answer:
The particle that can be deflected by an electric field is the **alpha particle**.