When a body becomes negatively charged, its mass

Options

A. decreases
B. increases
C. remains the same
D. None of these

Explanation

To determine how the mass of a body changes when it becomes negatively charged, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Charge and Electrons**:
- A body becomes negatively charged when it gains electrons. Electrons are fundamental particles that carry a negative charge.

2. **Identifying the Change in Charge**:
- When we say a body becomes negatively charged, it means that we are adding electrons to it.

3. **Calculating the Mass of Electrons**:
- Let’s denote the mass of one electron as \( m_e \). If we add \( N \) electrons to the body, the total mass contributed by these electrons will be \( N \times m_e \).

4. **Total Mass After Charging**:
- Initially, let the mass of the body be \( M \). After adding \( N \) electrons, the new mass \( M' \) of the body will be:
\[ M' = M + N \times m_e \]

5. **Conclusion**:
- Since \( N \times m_e \) is a positive quantity (as both \( N \) and \( m_e \) are positive), the mass of the body increases when it becomes negatively charged.

### Final Answer:
When a body becomes negatively charged, its mass **increases**.

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