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  1. A conducting sphere of radius R is given a charge Q. The electric potential
  2. ln a surrounding medium of temperature 10⁰C a body takes 7 min for a fall
  3. Laser light is considered to be coherant because it consists of
  4. The magnifying power of the astronomical telescope for normal adjustment is 50.
  5. Which one of the following is not a unit of young’s modulus?