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  1. A galvanometer has a coil of resistance 100 ohm and gives a full-scale deflection
  2. The focal lengths of a converging lens are fᵥ and fᵣ for violet and red lights
  3. A proton is projected with a speed of 3×10⁶ m/s horizontally from east to west.
  4. An engine pumps water through a hose pipe. Water passes through the pipe
  5. Cathode rays are produced when the pressure is of the order of