1. (10 points) It is speculated that the earth's magnetic eld is caused by a ow of electrons circling around in a loop within the earth's molten core. The earth rotates on its axis with the surface moving from west to east or counter Clockwise as seen looking down on the north geographic pole from space. In what direction must this electron current ow to produce the observed magnetic eld (clockwise or counterclockwise as seen looking down on the north geographic pole)? Show reasoning. 2. Is this statement true or false: The electrical field of an EM wave traveling north is seen to be directed up when at the same time the magnetic field is pointed west. 5. For the circuit shown: a) (5 points) Find the current drawn from the battery just after the switch is closed. b) (5 points) Find the current drawn from the battery after the switch has been closed a long time. c) (5 points) Find the voltage between points a and b after the switch has been closed a long time