You are presented with several wires made of the same conducting material. The radius and drift speed are given for each wire in terms of some unknown units \rm r and \rm v. Rank the wires in order of decreasing electron current.

Rank from most to least electron current.

a) radius=3r, drift speed=1v

b) radius=4r, drift speed=0.5v

c) radius=1r, drift speed=5v

d) radius=2r, drift speed=2.5v

The space within which a test north pole experiences a force magnetic poles 2. a powerful stream of electrons flowing high above the earth in the ionosphere electrojet 3. a concept to explain the directional nature of a magnetic field field lines 4. coil of wire designed to produce a magnetic field by a current passing through its windings ionosphere 5. that region above the earth's atmosphere where particles exist in an ionized state magnetic field 6. the extremities of a magnet where the field lines tend to converge or concentrate aurora borealis 7. a phenomenon that occurs in the northern latitudes; the northern lights solenoid