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What is the magnitude and direction of force on an electron moving along the direction of the magnetic field.

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What is the magnitude and direction of force on an electron moving along the direction of the magnetic field.
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When an electron is moving along the direction of the magnetic field, then angle `theta` between velocity vector `vecv` and magnetic field `vecB` is zero degree, i.e., `theta=0^@`. Lorentz magnetic force
`F=-evBsin0^@=0`.
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