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  1. A thin film of soap solution (n=1.4) lies on the top of a glass plate (n=1.5).
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  3. At 0⁰C, 15 gm of ice melts to form water at 0⁰C. The change in entropy is
  4. If the angular momentum of any rotating body increase by 200 % , then the increase
  5. Electric field at a point of distance r from a uniformly charged wire of infinite