Magnetic force per unit length between two parallel conductors:
, 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.
Both the wires have the same magnitude of the current.
i1 = i2 = 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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