The wires which connect the battery of an automobile to its starting motor carry a current of `300A` (for a short time). What is the force per unit length between the wires if they are `70cm` long and `1*5cm` apart? Is the force attractive or repulsive?

Explanation

To solve the problem, we need to calculate the force per unit length between two parallel wires carrying the same current. We will use the formula for the magnetic force per unit length between two parallel current-carrying wires.

### Step-by-Step Solution:

1. **Identify the Given Values**:
- Current (I) = 300 A
- Length of the wires (L) = 70 cm = 0.7 m (conversion from cm to m)
- Distance between the wires (r) = 1.5 cm = 0.015 m (conversion from cm to m)
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