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Physics

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An electron experiences 1.2 x 10^-3 force when it enters the external magnetic field, B with a velocity v. What is the force experienced by the electron if the magnetic field is increased two times and the velocity is decreased to half?

Okay so I know there's the formula

F = BIlsin0

But isn't the question missing some information? I'm very confused

  • Physics - ,

    F=qvBsinα
    F1=q(v/2)(2B)sinα = qvBsinα = 1.2x10^-3 T

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