2. A thick copper wire has a 2.0 A current flowing to the right as shown. At some point the wire suddenly becomes thinner such that it has one third the diameter it had before. Call the thicker part of the wire segment I and the thinner part segment 2. Calculate the ratio IM/Iz (the current in segment I to the current in segment 2): b. Calculate the ratio Ji/Jz (the current density in segment I to the current density in segment 2): C. Calculate the ratio El/Ez (the electric fields): d Calculate the ratio Var/Vaz (the drift velocities)