Calculate the force per unit length on a long straight wire carrying current `4A` due to parallel wire carrying current `6A` current. Distance between the wires `=3cm`.

Explanation

To calculate the force per unit length on a long straight wire carrying a current of 4 A due to a parallel wire carrying a current of 6 A, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Given Values:**
- Current in wire 1, \( I_1 = 4 \, \text{A} \)
- Current in wire 2, \( I_2 = 6 \, \text{A} \)
- Distance between the wires, \( D = 3 \, \text{cm} = 0.03 \, \text{m} \)
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