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A proton and an Au 11+ aremoving with equal velocities perpendicular to a unifor

ID: 1673026 • Letter: A

Question

A proton and an Au11+  aremoving with equal velocities perpendicular to a uniform magneticfield.  The Au11+ has 11times the charge as the proton and has 197times its mass. The ratio of the magnetic force on theAu11+ to that on the proton is:
   
A)1/11 B)1
    
C)11
D) 197

E) There is no magnetic force in thiscase A proton and an Au11+  aremoving with equal velocities perpendicular to a uniform magneticfield.  The Au11+ has 11times the charge as the proton and has 197times its mass. The ratio of the magnetic force on theAu11+ to that on the proton is:
   
A)1/11 B)1
    
C)11
D) 197

E) There is no magnetic force in thiscase

Explanation / Answer

F = Q v B       force on chargemoving perpendicular to magnetic field FAu / FP = 11 Q / Q =11           since v and B are the same for both particles