(1) A proton moves in the positive x direction through a uniform magnetic field in the positive y direction. What is the direction of the magnetic force on the proton? Explain your answer.
(2) A magnetic field CANNOT:
A. Exert a force on a charge
B. accelerate a charge
C. change the momentum of a charge
D. change the kinetic energy of a charge
E. Exist
(Please if you can explain your choice of the answer)
(3) A beam of electrons (with negative charges) moving at 1.3 x 10^6 m/s in a direction perpendicular to a uniform magnetic field travels in a circular arc of radius 0.35 m. What is the strength of the magnetic field?