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  1. A 200 W sodium street lamp emits yellow light of wavelength 0.6 µm
  2. A certain current on passing through a galvanometer produces a deflection
  3. A wire of length 1 m is placed in a uniform magnetic field of 1.5 tesla at an angle
  4. A source is moving towards an observer with a speed of 20 m/s and having frequency
  5. The innermost orbit of hydrogen atom has a diameter 1.06Å. The diameter of tenth