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  1. The area of cross-section of one limb of an U-tube is twice that of the other.
  2. The coefficient of performance of a Carnot refrigerator working between 30⁰C and 0⁰C is
  3. In an a.c circuit the e.m.f. (e) and the current (i) at any instant are given
  4. A block of mass 5 kg is moving horizontally at a speed of 1.5 m/s. A perpendicular force
  5. The bandgap in Germanium and silicon, in eV, are respectively