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1) At one instant, a proton is moving in the positive x direction in a uniform magnetic field which is 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

3) An electron moving at 1.50 x 10^6 m/s in a direction perpendicular to a uniform magnetic field travels in a circular arc of radius 0.250 m. What is the strength of the magnetic field? (Hint: the magnetic force acts as the centripetal force for the circular motions of the electron. Review centripetal force as needed.)

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  • Category:- Physics
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