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  1. A certain metallic surface is illuminated with monochromatic light of wavelength
  2. Two thin long conductors seprated by a distance d carry currents
  3. The ratio of the radii or gyration of a circular disc to that of a circular ring
  4. Dispersion of light is caused due to
  5. A boat is sent across a river with a velocity of 8 km/h.If the resultant velocity