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Physics (AS & A Level) · May / June 2025 · Paper 13 · Question 17

9702Energy conservation

An electric motor uses 1.7 kW of power when operating normally. The efficiency of the motor is 53%. What is the useful output power of the motor?

  1. A0.032 kW
  2. B0.90 kW
  3. C3.2 kW
  4. D90 kW

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Correct answer: B. 0.90 kW

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