An inflated rubber balloon is rubber with a woollen cloth whereas a ballpoint pen refill is rubbed with a polythene bag. Which of these will get positively charged ?
A.Inflated rubber ballon B.Woollen cloth C.Ballpoint pen refill D.Polythene bag

Options

A. A and B
B. B nad C
C. A and D
D. B and D

Answer

To determine which objects will get positively charged when rubbed together, we can analyze the two cases presented in the question.

### Step-by-Step Solution:

1. **Identify the Materials and Their Interactions**:
- We have two scenarios:
- **Case 1**: An inflated rubber balloon is rubbed with a woollen cloth.
- **Case 2**: A ballpoint pen refill is rubbed with a polythene bag.

2. **Understand Electron Transfer**:
- When two different materials are rubbed together, electrons may transfer from one material to another. The material that loses electrons becomes positively charged, while the material that gains electrons becomes negatively charged.

3. **Analyze Case 1**:
- In the first case, when the rubber balloon is rubbed with the woollen cloth:
- The woollen cloth tends to lose electrons to the rubber balloon.
- Therefore, the woollen cloth becomes positively charged, while the rubber balloon becomes negatively charged.

4. **Analyze Case 2**:
- In the second case, when the ballpoint pen refill is rubbed with the polythene bag:
- The ballpoint pen refill loses electrons to the polythene bag.
- Hence, the ballpoint pen refill becomes positively charged, while the polythene bag becomes negatively charged.

5. **Conclusion**:
- From the analysis:
- The woollen cloth (from Case 1) becomes positively charged.
- The ballpoint pen refill (from Case 2) also becomes positively charged.
- Therefore, the correct options for the objects that will get positively charged are:
- **B. Woollen cloth**
- **C. Ballpoint pen refill**

### Final Answer:
The correct options are **B (Woollen cloth)** and **C (Ballpoint pen refill)**.

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