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  1. In a compound microscope, the focal length of the objective is 2.5 cm and of eye lens
  2. The time period of a simple pendulum in a lift descending with constant acceleration g is
  3. B is doped in Si or Ge, then we will get
  4. The current through an inductor changes from 3 A to 2 A is 1 m/s. If induced e.m.f.
  5. The polarising angle of glass is 57⁰. A ray of light which is incident at this angle