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23 July, 06:18

A proton and an electron are moving in the + x direction in a magnetic field in the + z

direction. What are the directions of the forces on the proton and electron?

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Answers (1)
  1. 23 July, 07:34
    0
    Force on a moving charge is given by the following relation

    F = q (v x B)

    for proton

    q = e, v = vi, B = Bk

    F = e (vi x Bk)

    = Bev - j

    = - Bevj

    The direction of force is along negative of y axis or - y - axis.

    for electron

    q = - e, v = vi, B = Bk

    F = - e (vi x Bk)

    = - Bev - j

    = Bevj

    The direction of force is along positive of y axis or + y - axis.
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