Magnetic Force Between Parallel Currents Video Lessons

Concept

Problem: 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 cmb. Is the force attractive or repulsive

FREE Expert Solution

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 i1 and i2 are the currents in the two parallel wires, r is the distance between the parallel wires, and μ0 is the permeability of free space.

a.

Both the wires have the same magnitude of the current.

i1 = i2 = i

Problem Details

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