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  1. A step-up transformer operates on a 230 V line and supplies a current of 2 A.
  2. The maximum and minimum intensities of two sources is 4:1. The ratio of amplitude is
  3. A conveyor belt is moving at a constant speed of 2 m/s. A box is gently dropped on it
  4. A bar magnet has a coercivity of 4×10³ Am⁻¹. It is placed inside a solenoid
  5. A solid cylinder of mass 50kg and radius 0.5 m is, free to rotate about the horizontal axis