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The wires which connect the battery of a...

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?

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Here, `I_1=300A`, `I_2=300A`, `r=1*5cm=1*5xx10^-2m`, `F=?`
`F=(mu_0)/(4pi)(2I_1I_2)/(r)=10^-7xx(2xx300xx300)/(1*5xx10^-2)=1*2Nm^-1`, repulsive.
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