Two long parallel wires 45.6 cm apart are carrying currents of 13.0 A and 23.0 A in the same direction. What is the magnitude of the magnetic field halfway between the wires?
According to the given problem,
Each wire creates a field that is clockwise about the direction of the current flowing in it. This means that between the wires both fields are in the opposite direction so they substract.
B = o *i /2πr
B1 = o *i1 /2πr
B2 = o *i2 /2πr
Bnet = B2 - B1 = o * (i2 - i1) /2πr
Bnet = 4π*10-7 *(23-13) / 2π(0.456/2)
Bnet = 8.772*10-6 T.
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