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  1. An α-particle moves in a circular path of radius 0.83 cm in the presence of a magnetic
  2. When a beam of light is used to determine the position of an object,
  3. A string in musical instrument is 50 cm long and its fundamental frequency is 800 Hz.
  4. A,B and C are voltmeters of resistance R, 1.5 R and 3R respectively, as shown
  5. The unit of specific conductivity is