A copper wire is stretched to make it 0.2% longer. What is the percentage change in its resistance?

Explanation

To solve the problem of finding the percentage change in the resistance of a copper wire that is stretched to make it 0.2% longer, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the relationship between resistance, length, and area**:
The resistance \( R \) of a wire is given by the formula:
\[
R = \frac{\rho L}{A}
...