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MHT CET2007PhysicsAlternating Current

An electron is travelling along the x -direction. It encounters a magnetic field in the y -direction. Its subsequent motion will be

Options

  1. Astraight line along the x -direction
  2. Ba circle in the x z -plane
  3. Ca circle in the y z -plane
  4. Da circle in the x y -plane

Correct answer

D. a circle in the x y -plane

Step-by-step solution

If a particle carrying charge q and moving with velocity v through a point in magnetic field experiences a deflecting force F , then magnetic field B is given by Here, array l F =q v B v =v_ x i and array B =B_ y j F =e v_ x B_ y ( i j )=e v_ x B_ y k Hence, subsequent motion of the charged particle will be a circle in the x y -plane.

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