일반물리학 2 — Magnetic Fields Due to Currents: Problem 55

55 One long wire lies along an \(x\) axis and carries a current of \(60\text{ A}\) in the positive \(x\) direction. A second long wire is perpendicular to the \(xy\) plane, passes through the point \((0, 4.0\text{ m}, 0)\), and carries a current of \(40\text{ A}\) in the positive \(z\) direction. What is the magnitude of the resulting magnetic field at (a) the point \((0, 2.0\text{ m}, 0)\) and (b) the point \((2.0\text{ m}, 4.0\text{ m}, 0)\)?