Define fundamental unit and write any two examples.

Explanation

**Step-by-Step Solution:**

1. **Definition of Fundamental Unit:**
A fundamental unit is a basic unit of measurement that is defined independently and is used to measure fundamental physical quantities. These units are not derived from other units and are essential for expressing measurements in physics.

2. **Examples of Fundamental Units:**
- **Example 1: Length**
- Fundamental Quantity: Length
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