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  1. A carnot’s engine operates with source at 127° C and sink at 27°C
  2. A rectangular copper coil is placed in a uniform magnetic field of induction 40 mT
  3. A bullet is shot from a riffle. As a result the rifle recoils.The kinetic energy of riffle
  4. Two bodies of mass 1 kg and 3 kg have positive vectors i + 2j + k and -3i -2j + k
  5. The magnifying power of a convex lens of focal length 10 cm, when the image