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  1. A light of wavelength 5000Å falls on a sensitive plate with photoelectric work
  2. The respective speeds of the molecules are 1,2,3,4 and 5 km/s.
  3. A capacitor of 10 µF charged upto 250 volt is connected in parallel with another
  4. A nucleus ᵐₙ X emits one α- particle and two β- particles. The resulting nucleus is
  5. Two identical thin plano-convex glass lenses (refractive index 1.5) each having