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Most Important Selected Qs for JEE AdvancedPhysicsElectrostatics

Paragraph: A small charged bead (mass = m, charge = Q) can slide on a circular frictionless, fixed insulating wire frame. A point like dipole (dipole moment P) is fixed at the centre of circle. Bead is released from rest from given position 'A'. (Neglect gravity) Question: Speed of bead as a function of is

Options

  1. A- QP 2 ₀ mr
  2. B- QP 2 ₀ m r^2
  3. CQ P 2 ₀ m r^2
  4. DQP 2 ₀ m r^2

Correct answer

B. - QP 2 ₀ m r^2

Step-by-step solution

1 2 m u^2-0=Q [0- 1 4 ₀ P r^2 ]v= - QP 2 ₀ mr ^2

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