Three points are arranged in a uniform magnetic field. The magnetic field B points into the screen.
1. A positively charged particle is located at point A and is stationary. The direction of the magnetic force on the particle is
A. right
B. left
C. Up
D. Down
E. zero
2. The positive charge moves from A toward B. The direction of the magnetic force on the particle is
A. right
B. left
C. Up
D. Down
E. zero
3. The positive charge moves from B toward C. The direction of the magnetic force on the particle is
A. right
B. left
C. Up
D. Down
E. zero
4. The negative charge moves from B toward C. The direction of the magnetic force on the particle is
A. right
B. left
C. Up
D. Down
E. zero
5. The negative charge moves from B toward A. The direction of the magnetic force on the particle is
A. right
B. left
C. Up
D. Down
E. zero