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  1. Characteristic X-rays are produced due to
  2. A straight conductor of length 0.4 m is moved with a speed of 7 ms⁻¹perpendicular
  3. A body of mass 2 kg is kept by pressing to a vertical wall by a force of 100 N
  4. Which of the following is true for number of spectral lines in going from Lyman series
  5. If r denotes the distance between sun and the earth, then the angular momentum of the earth