Physics 0625 · IGCSE · Energy, work and power

Energy, work and power — practice question

An electric motor has a power input of $400\text{ W}$. Its efficiency is $85\%$. Calculate the amount of power wasted.

  • A$60\text{ W}$
  • B$85\text{ W}$
  • C$340\text{ W}$
  • D$470\text{ W}$

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