A

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Q. Calculate the useful power developed by a motor using the given data: P = 3000 W, I = 60 A, R = .4 Ω. Assume frictional losses are 200 W and windage losses are 400 W.

  • (A) 970 W
  • (B) 960 W
  • (C) 980 W
  • (D) 990 W

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