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  1. Light of wavelength 500 nm is incident on a metal with work function 2.28 eV.
  2. The core of a transformer is laminated because
  3. A tangent galvanometer has a coil of 50 turns and a radius of 20 cm. The horizontal
  4. The barrier potential of a p-n junction depends on
  5. The given graph represents V-I characteristic for a semiconductor device