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Most Important Selected Qs for JEE AdvancedPhysicsMagnetic Effects of Current

Paragraph: If the velocity of a charged particle moving through a uniform magnetic field has a component parallel to that field the particle will move in a helical path as shown in figure 1. The net force F on the particle can be described by the equation. F = qvB where q is the charge on the particle, v is the velocity of the charge, B is the magnetic field strength, and is the angle between the velocity and the mag

Options

  1. Acounterclockwise both when looking up from the north pole or when looking up from the south pole.
  2. Bclockwise both when looking up from the north pole of when looking up from the south pole.
  3. Cclockwise when looking up from the north pole but counterclockwise when looking up from the south pole.
  4. Dcounterclockwise when looking up from the north pole but clockwise when looking up from the south pole.

Correct answer

C. clockwise when looking up from the north pole but counterclockwise when looking up from the south pole.

Step-by-step solution

aligned & Pitch = V _ | time to complete one rotation = V _ | 2 m q B & Period of rotation = 2 m q B aligned

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