Physics 0625 · IGCSE · Energy, work and power

Energy, work and power — practice question

An electric motor delivers $900\,\text{J}$ of useful output energy. Its efficiency is $60\%$. What electrical energy is provided to the motor?

  • A$15\,\text{J}$
  • B$540\,\text{J}$
  • C$1500\,\text{J}$
  • D$5400\,\text{J}$

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