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  1. Two capacitors having capacitances C₁ and C₂ are charged with 120V and 200V batteries
  2. When a bullet of mass 10 g and speed 100 ms⁻¹ penetrates up to distance 1 cm
  3. A ray of light travelling in a transparent medium of refractive index µ, falls on surface
  4. The energy of the em waves is of the order of 15 keV. To which part of the spectrum
  5. What is the difference between soft and hard X-ray?