Part A. Four particles of identical charge and mass enter a region of uniform magnetic field and follow the trajectories shown in (Figure 1) .
Which particle has the highest velocity?

Part B. A loop of wire carries a current. The resulting magnetic field __________.

A) is similar to that of a bar magnet perpendicular to the plane of the loop
B) is similar to that of a bar magnet in the plane of the loop
C) points toward the loop at all points
D) points away from the loop at all points

Part C. The direction of the magnetic force on a moving charged particle in a magnetic field is __________. both perpendicular to the velocity and perpendicular to the magnetic field

A) Perpendicular to the velocity
B) Perpendicular to the magnetic field
C) Perpendicular to both the velocity and the magnetic field

Part D. Two parallel wires carry a current in the same direction. There is ___________ between the wires.

A) a repulsive force
B) an attractive force