Two glass rods are rubbed with a silk cloth and two ebonite rods are rubbed with a piece of fur. Which of these pairs of charged objects will attract each other?

Options

A. The two glass rods
B. The silk cloth and the piece of fur
C. Either of the two glass rods and the piece of fur
D. The silk cloth and either of the two ebonite rods

Answer

To determine which of the pairs of charged objects will attract each other, we need to understand the nature of the charges generated when different materials are rubbed together.

### Step-by-Step Solution:

1. **Identify the Materials and Their Charges:**
- Glass rods rubbed with silk cloth acquire a positive charge.
- Ebonite rods rubbed with fur acquire a negative charge.

2. **Understand the Principle of Attraction and Repulsion:**
- Opposite charges attract each other, while like charges repel each other.
- Therefore, a positively charged object will attract a negatively charged object.

3. **Analyze the Pairs:**
- We have two glass rods (positively charged) and two ebonite rods (negatively charged).
- The glass rods will repel each other since they have the same charge.
- The ebonite rods will also repel each other for the same reason.

4. **Determine the Interaction Between Different Types:**
- The glass rods (positive charge) will attract the ebonite rods (negative charge).
- Thus, the pair of one glass rod and one ebonite rod will attract each other.

5. **Conclusion:**
- The pair of charged objects that will attract each other is the glass rod and the ebonite rod.

### Final Answer:
The glass rods and the ebonite rods will attract each other.

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