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  1. A man throws balls with the same speed vertically upwards one after the other
  2. The maximum number of possible interference maxima for slit-seperation equal to
  3. A source of light is placed at a distance of 50 cm from a photocell and the stopping
  4. The primary of a transformer when connected to a dc battery of 10 volt draws a current
  5. A black body is at 727⁰C. It emits energy at a rate which is proportional to