Exam-style question
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If a charged particle moves perpendicular to the magnetic field, what is the effect on its kinetic energy?.
- A.It increases
- B.It decreases
- C.It remains constant
- D.It becomes zero
Model answer
What a good answer should say
- It remains constant
Explanation
Why this works
The kinetic energy of a charged particle remains constant when moving perpendicular to the magnetic field because the magnetic force does no work on the particle, only changing its direction.
Common mistake
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