Two identical long wires of radius a = 0.530 mm are parallel and carry identical currents in opposite directions. Their center-to-center separation is d = 20.0 cm. Neglect the flux within the wires but consider the flux in the region between the wires. What is the inductance per unit length of the wires?

Explanation

To find the inductance per unit length of two identical long wires carrying identical currents in opposite directions, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Given Values**:
- Radius of the wires, \( a = 0.530 \, \text{mm} = 0.0530 \, \text{cm} \)
- Center-to-center separation, \( d = 20.0 \, \text{cm} \)

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