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  1. A small rod of bismuth is suspended freely between the poles of a strong electromagnet.
  2. The resistance of an ammeter is 13Ω and its scale is graduated for a current
  3. A disc of moment of inertia (9.8/π²) kg m² is rotating at 600 rpm. If the frequency
  4. In a series resonant LCR circuit, the voltage across R is 100 volts and R =1kΩ
  5. The potential energy of a system increases if work is done