# Ampere and Pythagoras

**Electricity and Magnetism**Level 4

Two parallel wires carry \(1~\mbox{A}\) currents in unknown directions. The distance between the axes of the wires is \(10~\mbox{cm}\). What is the magnitude of the magnetic field \(B\) **in Teslas** at a point P located \(6~\mbox{cm}\) away from the axis of one of the wires and \(8~\mbox{cm}\) away from the axis of the other wire?

**Details and assumptions**

\[\frac{\mu_{0}}{4\pi}= 10^{-7}~\mbox{H/m}\]