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Related Questions

  1. The number of photons of wavelength of 540 nm emitted per second by an electric bulb
  2. The potential energy of particle in a force field is U = A/r² – b/r, where A and B
  3. The ionisation energy of an electron in the ground state of helium atom is 24.6 eV.
  4. The threshold wavelength for photoelectric emission from a material is 4800 Å.
  5. A wire of resistance 4 ohm is stretched to twice its original length.