Physics

Problem

Two parallel, infinitely long straight wires are

4.0\,\text{cm}

apart and carry currents

I_1 = 10\,\text{A}

and

I_2 = 15\,\text{A}

in the same direction. Calculate the magnitude of the magnetic field at the point midway between the wires.

(\mu_0 = 4\pi\times10^{-7}\,\text{T m A}^{-1})

2.5\times10^{-4}\,\text{T}

1.0\times10^{-4}\,\text{T}

5.0\times10^{-5}\,\text{T}

2.5\times10^{-5}\,\text{T}