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  1. Ring, hollow ring and solid sphere are rolled down from inclined plane
  2. Three cells, each of e.m.f 1.5 V and internal resistance 1 ohm are connected in parallel
  3. The polarising angle of glass is 57⁰. A ray of light which is incident at this angle
  4. A ship of mass 3 x 10⁷ kg initially at rest is pulled by a force of 5 x 10⁴ N through
  5. The electron of a hydrogen atom revolves round the proton in a circular