A copper wire is stretched to make it `0.5%` longer. The percentage change in its electrical resistance if its volume remains unchanged is :

Options

A. 0.025
B. 0.005
C. 0.01
D. 0.02

Explanation

To solve the problem of finding the percentage change in electrical resistance of a copper wire that is stretched to make it 0.5% longer while keeping its volume constant, 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}
...