A) \[\vec{F}=q(\vec{E}+\vec{v}\times \vec{B})\]
B) \[\vec{F}=q(\vec{E}-\vec{v}\times \vec{B})\]
C) \[\vec{F}=q(\vec{E}+\vec{v}.\vec{B})\]
D) \[\vec{F}=q(\vec{E}\times \vec{B}+\vec{v})\]
Correct Answer: A
Solution :
Lorentz force is given by \[\vec{F}={{\vec{F}}_{e}}+{{\vec{F}}_{m}}=q\vec{E}+q(\vec{v}\times \vec{B})=q[\vec{E}+(\vec{v}\times \vec{B})]\]
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