Download Problems Chapter14 Q12 My Solutions

Physics 110 Problems - My Solutions
Dr. Hulan E. Jack Jr.
Chapter14 Q12
Griffith, W. Thomas; The physics of everyday phenomena: a conceptual introduction for
physics;4th Edition ISBN 0-07-250977-5
THE PROBLEM STATEMENT
Ch14 Q12 A positively charged particle is momentarily at rest in a uniform magnetic field. Is
there a magnetic force acting on this particle? Explain.
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Page 1 of 3
Physics 110 Problems - My Solutions
Dr. Hulan E. Jack Jr.
Ch14 Q12 A positively charged particle is momentarily at rest in a uniform magnetic field. Is
there a magnetic force acting on this particle? Explain.
Definitions, concepts , principles and Discussion
B
+q
+
F
vperpendicular
A charge particle with charge +q with a velocity v
that has a component perpendicular vperpendicular to a
uniform magnetic field B will experience a magnetic
force, F perpendicular to both B and vperpendicular,
where
F = q B vperpendicular .
Discussion
Note that there must be a component of the velocity that is perpendicular the uniform
magnetic field B.
BRAINSTORMING
Page 2 of 3
Physics 110 Problems - My Solutions
Dr. Hulan E. Jack Jr.
Ch14 Q12 A positively charged particle is momentarily at rest in a uniform magnetic field. Is
there a magnetic force acting on this particle? Explain..
Basic Solution (Minimum Expected from the student)
The charged particle is momentarily at rest, so v = 0. F = qBvperpendiclar. Since v = 0, F= 0.
BRAINSTORMING
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