part a part complete find the direction of the force that our planet's magnetic field exerts on this wire if is oriented so that the current in it is running from west to east. the force is directed upward. the force is directed downward. there is no force exerting on the wire. the force is directed from east to west. previous answers correct part b part complete find the magnitude of the force that our planet's magnetic field exerts on this wire if is oriented so that the current in it is running from west to east. express your answer with the appropriate units. f1