1 Two very long, straight, parallel wires carrying currents in opposite directio

Question

1 Two very long, straight, parallel wires carrying currents in opposite directions are 0.02m apart. If the current in first wire is 6A and the current in second wire is 8A what is the magnitude of the magnetic field at the midpoint between the wires? (0.28mT)

2 Two very long, straight, parallel wires carrying currents in same direction are 0.02m apart. If the current in first wire is 6A and the current in second wire is 8A what is the magnitude of the magnetic field at the midpoint between the wires? (0.04mT)

Explanation / Answer

B=u0 i1+i2)/2 pi r

B= 2*10^-7*(6+8)/0.01

B = 0.28mT

b. B =U0(I2-I1)2 PI R

B= 0.04mT

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