Both the ebonite rods were charged by rubbing with fur. They also acquired ................. charges.

Explanation

To solve the question, we need to understand the process of charging by friction and the nature of the materials involved.

### Step-by-Step Solution:

1. **Identify the Materials**: We have ebonite rods and fur. Ebonite is a type of hard rubber that is known to acquire a negative charge when rubbed against certain materials.

2. **Understand Charging by Friction**: When two different materials are rubbed together, electrons can be transferred from one material to the other. The material that loses electrons becomes positively charged, while the material that gains electrons becomes negatively charged.

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