When a soap bubble is charged :-

Options

A. A. Bursts
B. B. Does not undergo any change
C. C. Expands
D. D. Contracts

Answer

To solve the question "When a soap bubble is charged, what happens?", we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding the Concept of Soap Bubbles**:
- A soap bubble is a thin film of soapy water that traps air inside. It has a certain surface tension due to the liquid film.

2. **Effect of Charging on Soap Bubbles**:
- When a soap bubble is charged, it acquires an electric charge. This charge affects the forces acting on the surface of the bubble.

3. **Surface Tension and Expansion**:
- Surface tension is the force that causes the surface of a liquid to behave like a stretched elastic membrane. When a soap bubble is charged, the electric forces acting on the surface tension lead to a change in the bubble's dimensions.

4. **Minimizing Surface Tension**:
- The charged bubble will expand to minimize the surface tension. This is because an increase in surface area reduces the energy associated with the surface tension. The bubble tries to reach a state of lower potential energy.

5. **Conclusion**:
- Therefore, when a soap bubble is charged, it expands to decrease the surface tension. This means the correct answer to the question is that the soap bubble expands.

### Final Answer:
When a soap bubble is charged, it expands to decrease the surface tension.

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