A metallic wire is doubled on itself. How do its resistance and specific resistance change?

Explanation

To solve the problem of how the resistance and specific resistance change when a metallic wire is doubled on itself, we can follow these steps:

### Step 1: Understand the formula for resistance
The resistance \( R \) of a wire is given by the formula:
\[ R = \frac{\rho L}{A} \]
where:
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