Question

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?

Answer #1

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

B_{1} = o *i_{1} /2πr

B_{2} = o *i_{2} /2πr

B_{net} = B_{2} -
B_{1} = o * (i_{2} - i_{1})
/2πr

B_{net} = 4π*10^{-7}
*(23-13) / 2π(0.456/2)

**B _{net} =
8.772*10^{-6} T.**

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