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  1. Length of a conductor is 50 cm radius of cross section 0.1 cm and resistivity
  2. The ratio of volumes of nuclei (assumed to be in spherical shape) with respective
  3. In a circuit, 5% of total current passes through a galvanometer. If resistance
  4. One solid sphere A and another hollow sphere B are of same mass and same outer radii.
  5. Which one of the following is not due to total internal reflection?