Magnetic field around a conductor:

$\overline{){\mathbf{B}}{\mathbf{=}}\frac{{\mathbf{\mu}}_{\mathbf{0}}\mathbf{i}}{\mathbf{2}\mathbf{\pi}\mathbf{r}}}$

Where i is the current through the conductor and r is the distance from the conductor.

Two long, straight, parallel wires, 10.0 cm apart carry equal 4.00-A currents in the same direction, as shown in the figure.

Part A

Find the magnitude of the magnetic field at point P_{1}, midway between the wires.

Part B

What is the direction?

a. to the left

b. to the right

c. upward

d. downward

e. no field

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