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zhiyuan3yu5 Group Title

In which direction does a magnetic force act on an electron that is moving in the positive x-direction in a magnetic field pointing in the positive z-direction? A) any direction in the xy-plane B) the negative y-direction c) the negative x-direction D) the positive y-direction a particle with charge q is at rest when a magnetic field is suddenly turned on. The field points in the z-direction. What is the direction of the net force acting on the charged particle? a) In the z-direction. b) There is no force on the particle. c) In the y direction d) In the x direction

  • one year ago
  • one year ago

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  1. imron07 Group Title
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    The direction of magnetic force is the same as vextor v x B direction. It follows right hand rule, so postive x X positive z = negative y direction. F=qE. The force direction follows magnetic field E direction. Hence a)

    • one year ago
  2. ghazi Group Title
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    \[F=q*(V*B)\] take the cross product of the movement of electron and applied magnetic field

    • one year ago
  3. AERONIK Group Title
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    there is no force acting on the particle in the second question as the magnetic force acts only on those particles which are in motion.

    • one year ago
  4. timo86m Group Title
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    use right hand rule

    • one year ago
  5. imron07 Group Title
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    @AERONIK : the magnetic force is changing (from zero then turned on).

    • one year ago
  6. zhiyuan3yu5 Group Title
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    i did the right hand rule for the first one and got neg y as well. for the 2nd question, is it b? no net force?

    • one year ago
  7. Ninalynn Group Title
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    Actually yes I think its B

    • one year ago
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