Magnetic force per unit length between two parallel conductors:

$\overline{)\frac{\mathbf{F}}{\mathbf{l}}{\mathbf{=}}\frac{{\mathbf{\mu}}_{\mathbf{0}}{\mathbf{i}}_{\mathbf{1}}{\mathbf{i}}_{\mathbf{2}}}{\mathbf{2}\mathbf{\pi}\mathbf{r}}}$, where i_{1} and i_{2} are the currents in the two parallel wires, r is the distance between the parallel wires, and μ_{0} is the permeability of free space.

**a. **

Both the wires have the same magnitude of the current.

i_{1} = i_{2} = i

The force per meter between the two wires of a jumper cable being used to start a stalled car is 0.225 N/m

a. What is the current in the wires, given they are separated by 2.00 cm

b. Is the force attractive or repulsive

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