Physics 5054 · O Level · Efficiency

Efficiency — practice question

A motor receives an input power of $12\,\text{W}$. Over $1.0\,\text{min}$, it loses $590\,\text{J}$ of energy. Calculate the efficiency of the motor.

  • A$18\%$
  • B$22\%$
  • C$55\%$
  • D$82\%$

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