A current-carrying wire oriented north–south and laid over a compass deflects the compass 10° to the east. (a) What is the magnitude of the magnetic field made by the current? The horizontal component...

A current-carrying wire oriented north–south and laid over a compass deflects the compass 10° to the east. (a) What is the

magnitude of the magnetic field made by the current? The horizontal component of Earth's magnetic field is about 2 × 10−5

tesla. (b) In what direction does the electron current flow in the wire?