A particle having the same charge and 200 times greater mass than that of electron is

Options

A. Positron
B. Proton
C. Neutrino
D. Meson

Explanation

To solve the question, we need to identify a particle that has the same charge as an electron and is 200 times heavier than an electron. Let's break down the solution step by step.

### Step-by-Step Solution:

1. **Understanding Electron Properties**:
- The electron has a charge of \(-1\) (in units of elementary charge) and a mass of approximately \(9.11 \times 10^{-31}\) kg.

2. **Identifying the Mass Requirement**:
- We need a particle that has a mass of \(200\) times that of the electron.
- Therefore, the mass of the required particle will be:
\[ \text{Mass of the particle} = 200 \times (9.11 \times 10^{-31} \text{ kg}) \approx 1.82 \times 10^{-28} \text{ kg} \]

3. **Finding a Particle with the Same Charge**:
- The only known particle that has the same charge as an electron (which is \(-1\)) is the **positron**. However, the positron has the same mass as an electron, not 200 times more.
- We need to look for other particles that are heavier and still carry a charge of \(-1\).

4. **Exploring Other Particles**:
- **Muons**: Muons are heavier than electrons (approximately \(200\) times the mass of an electron), but they have a charge of \(-1\) (like electrons).
- **Pions (π mesons)**: Pions are also heavier than electrons (approximately \(273\) times the mass of an electron) and have a charge of \(-1\) (for the negatively charged pion, \(\pi^-\)).

5. **Conclusion**:
- The particle that fits the criteria of having the same charge as an electron and being about \(200\) times heavier is the **muon**.

### Final Answer:
The particle having the same charge and 200 times greater mass than that of an electron is a **muon**.

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