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JEE Main20206 Sep 2020Morning ShiftPhysicsMagnetic Effects of CurrentActual

A particle of charge q and mass m is moving with a velocity - v i ^ ( v ≠ 0 ) towards a large screen placed in the Y - Z plane at distance d. If there is magnetic field B → = B 0 k ^ , the minimum value of v for which the particle will not hit the screen is :

Options

  1. AqdB 0 3 m
  2. B2 q d B 0 m
  3. Cq d B 0 m
  4. DqdB 0 2 m

Correct answer

C. q d B 0 m

Step-by-step solution

The radius of circular path in given magnetic field is r = d = m v q B 0 so v = q B 0 d m

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