A) Always exerts a force on a charged particle
B) Never exerts a force on a charged particle
C) Exerts a force, if the charged particle is moving across the magnetic field lines
D) Exerts a force, if the charged particle is moving along the magnetic field lines
Correct Answer: C
Solution :
\[\overrightarrow{F}=q\overrightarrow{v\,}\times \overrightarrow{B}\]
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