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  1. In a potentiometer experiment two cells of e.m.f. E₁ and E₂ are used in series
  2. A ball is projected upwards from the foot of a tower. The ball crosses the top
  3. A solenoid has length 0.4 cm, radius 1 cm and 400 turns of wire. If a current
  4. A boat of mass 40 kg is at rest.A dog of mass 4 kg moves in the boat
  5. In the equation y=asin(?t+kx),the dimensionals formula of ? is