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Write the expression in vector form for the magnetic force `vecF` acting on a charged particle moving with velocity `vecv` in the presence of a magnetic field `vecB`. What is the direction of the magnetic force ?

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Force `vecF = q(vecv xx vecB)`, Where q = charge on the particle. Direction of magnetic force is along the direction of `vecv xx vecB` and it is perpendicualr to both `vecv` as well as `vecB`.
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